Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thien van » thi van
va triet » va thiet, va trien, ve triet
sach ky » sac ky, sach y, sach ty
tai hoi » tai khoi, dai hoi, tai hoe
tai hai » thi hai, dai hai, tai ha
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
nam tu » nam thu, nam thuc

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky nang ((tai hoi) OR (tai hai)). thien van nam tu va hanh vi ((cua tre) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky nang ((tai hoi) OR (tai hai)). thien van nam tu va hanh vi ((cua tre) OR (va triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky nang ((tai hoi) OR (tai hai)). thien van nam tu va hanh vi ((cua tre) or (va triet))*".