Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cao thuc » cao thuoc, bao thuc, can thuc
ban hanh » ban hang
sach thu » sach thue, sach thieu, sach tham
van hanh » van thanh, van anh, van ban
sach ty » sach y, sach tu, xach tay
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cao » va cac, va co, va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ty) or (sach thu)) nang xa hoi. hieu va cao thuc ((van hanh) OR (ban hanh)) dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach thu)) nang xa hoi. hieu va cao thuc ((van hanh) OR (ban hanh)) dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) or (sach thu)) nang xa hoi. hieu va cao thuc ((van hanh) OR (ban hanh)) dai cua triet".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach thu)) nang xa hoi. hieu va cao thuc ((van hanh) OR (ban hanh)) dai cua triet*.