Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
va triet » va thiet, va trien, ve triet
te sach » toc sach
sach ly » sach y, sach lo, sach ty
ly hang » ly quang
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
co hoi » co hoc, co loi
va dan » ca dan, va dao, va dau
vi va » vi van, vai va, vu va

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 ly hang ((co hoi) or (xa hoi)). hieu va cac xuc ((va dan) or (van hanh)) vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly hang ((co hoi) OR (xa hoi)). hieu va cac xuc ((va dan) OR (van hanh)) vi va triet.
• Adding a wildcard symbol may retrieve word variants: te sach ly hang ((co hoi) or (xa hoi)). hieu va cac xuc ((va dan) or (van hanh)) vi va triet*.