Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
hanh dai » hanh tai, hanh dao, vanh dai
tang tai » hang tai, dung tai, sang tao
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, va danh
cac luc » cau luc, coc luc, cac nuoc
hieu ve » hieu va, hieu van
tai hoi » tai khoi, dai hoi, tai hai
ky tang » ky nang, ky dang, kho tang
ve cac » va cac, vien cac
luc va » duc va, tuc va, loc va
cua tu » cua tuc, cua cu, cua te
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thuat san)) ky tang tai hoi. hieu ve cac luc va hanh dai ((cua tu) or (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat san)) ky tang tai hoi. hieu ve cac luc va hanh dai ((cua tu) OR (cua su)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat san)) ky tang tai hoi. hieu ve cac luc va hanh dai ((cua tu) or (cua su))*.