Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
van hanh » van thanh, ban hanh, van anh
thi hanh » thi thanh
cam tuc » cam xuc, cam tu, nam thuc
va hanh » va thanh, va danh, ban hanh
tu sach » thu sach, su sach, tu cach
hanh xa » hanh va, hanh ma, hanh xu
te sach » toc sach
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao

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) or (te sach)) thi hanh xa hoi. hieu va cam tuc ((va hanh) or (van hanh)) nam va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) thi hanh xa hoi. hieu va cam tuc ((va hanh) OR (van hanh)) nam va triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) thi hanh xa hoi. hieu va cam tuc ((va hanh) or (van hanh)) nam va triet*.