Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh tai » thanh tai, hang tai, han tai
sach tu » sach thu, cach tu, sach ty
va hanh » van hanh, va thanh, va danh
cam luc » cau luc
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
tu nang » tru nang, tu nong, tu nano
tai va » thai va, mai va, tri va

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 tu nang xa hoi. ((hieu ve) or (hieu qua)) ((cam luc) or (cam xuc)) va hanh tai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu nang xa hoi. ((hieu ve) OR (hieu qua)) ((cam luc) OR (cam xuc)) va hanh tai va triet.
• Adding a wildcard symbol may retrieve word variants: tu sach tu nang xa hoi. ((hieu ve) or (hieu qua)) ((cam luc) or (cam xuc)) va hanh tai va triet*.