Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
hanh vai » hanh vi, hanh va, hanh van
hieu ve » hieu va, hieu van
cao duc » dao duc, cao suc, giao duc
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
ve cao » va cao, ve bao, ve cac
x hoi » xa hoi, o hoi, 5 hoi
chua » cua, chu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky nang ((x hoi) OR (x ho)). hieu ve cao duc va ((hanh vai) or (hanh tai)) sua chua~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky nang ((x hoi) OR (x ho)). hieu ve cao duc va ((hanh vai) OR (hanh tai)) sua chua.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky nang ((x hoi) OR (x ho)). hieu ve cao duc va ((hanh vai) or (hanh tai)) sua chua".
• Adding a wildcard symbol may retrieve word variants: tu sai ky nang ((x hoi) OR (x ho)). hieu ve cao duc va ((hanh vai) or (hanh tai)) sua chua*.