How to search to avoid an unfair clan war in Clash of Clans

Have you ever wondered why your clan meet a very strong clan in Clan Wars? Even sometimes, the opponent have more than 5-6 bases at 1-tier level. In my observation, if a clan has more 1-tier base, that clan will win mostly. (For example, you search a clan war of 20 and your clan has 5 hall 10, 12 hall 9, 3 hall 8 and your opponent has 3 hall 10, 14 hall 9 and 3 hall 8. Then your clan has more advantages in 1-tier of hall10).

Unfair match make you get angry :D

Why unfair search still exist? Because of MatchMaking system machnism of Clash of Clans. "The matchmaking system in Clan Wars puts your clan against another clan of similar strength both offensively and defensively, and of the same size, rounded down to multiples of five eligible members. Experience level of members, number of trophies, number of wars won by a clan and clan level will not influence the matchmaking process whatsoever." (Wikia).

After a leader click on war search button, it is listed in a queue with other's clan requests. The "perfect" couple with similar strength will be matched. If there is no similar clan, it is still in the queue.
Logically, Supercell can not let your request into timeless status, then after "acceptable waiting time", your clan will be matched with slightly similar clan. Luckily, your opponent strength will lower than you or you will say "UNFAIR, Supercell".

In Short, before the end of "Acceptable Waiting Time", the leader should cancel Clan War Matchmaking and start searching again. In my experience, "acceptable waiting time" is under 10 minutes. Be patient and you will have wishing matches :D.

Remember that found clan is the first factor to decide you have more advantages in Clan War, but it does not mean that you will win in the match. It still depends on several factors such as members skills, luckiness while dropping the troops... but I still hope that this tip will help you guys can search very "fair" Clan Wars.