Perhaps you should try some spelling variations:
dua tren » dung tren
lai hoi » dai hoi, lai hoa, lai roi
hieu ve » hieu va, hieu van
cao duc » dao duc, cao suc, giao duc
tan anh » tuan anh, tran anh, toan anh
toan y » toan ly, toan ky, toan my
y nang » ky nang, ly nang, v nang
ve cao » va cao, ve bao, ve cac
anh va » hanh va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat toan y nang ((lai hoi) or (xa hoi)). hieu ve cao duc tan anh va ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat toan y nang ((lai hoi) OR (xa hoi)). hieu ve cao duc tan anh va ((dua tren) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: thuat toan y nang ((lai hoi) or (xa hoi)). hieu ve cao duc tan anh va ((dua tren) or (cua te))*.