Perhaps you should try some spelling variations:
cuc triet » cua triet, su triet, cac trieu
hieu van » hieu va, thien van, lieu va
can thuc » dan thuc, van thuc, cay thuc
danh tai » doanh tai, dinh tai, hanh tai
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
nang xa » nang x, lang xa, nang ma
va danh » va dinh, va dan, va hanh

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 van) or (hieu qua)) ((cau truc) or (can thuc)) va danh tai cuc triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu nang xa hoi. ((hieu van) OR (hieu qua)) ((cau truc) OR (can thuc)) va danh tai cuc triet.
• Adding a wildcard symbol may retrieve word variants: tu sach tu nang xa hoi. ((hieu van) or (hieu qua)) ((cau truc) or (can thuc)) va danh tai cuc triet*.