Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cua triet » cua viet, su triet, va triet
doc sach » hoc sach, toc sach, nuoc sach
cac truc » cau truc, cac tru, cac trung
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
lai cua » dai cua, hai cua, lai chau

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach tu nang xa hoi. hieu va cac truc ((va hanh) or (ban thanh)) lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach tu nang xa hoi. hieu va cac truc ((va hanh) OR (ban thanh)) lai cua triet.
• Adding a wildcard symbol may retrieve word variants: doc sach tu nang xa hoi. hieu va cac truc ((va hanh) or (ban thanh)) lai cua triet*.