Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
manh anh » minh anh, anh anh, thanh anh
duc manh » suc manh, duc anh, duc minh
cua tre » cua te, cuu tre, dua tren
cao duc » dao duc, cao suc, giao duc
van cao » van dao, van bao, van hao
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, me hoi
anh va » hanh va
song y » dong y, song _, song ray

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat song y nang ((ma hoi) or (ma hoa)). hieu van cao duc manh anh va ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat song y nang ((ma hoi) OR (ma hoa)). hieu van cao duc manh anh va ((cua tre) OR (cua triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat song y nang ((ma hoi) or (ma hoa)). hieu van cao duc manh anh va ((cua tre) OR (cua triet))*".