Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
sach thi » sach thu, sach tai, sach thieu
thi hanh » thi thanh
nam thuc » nam thuoc, am thuc, nam thu
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
cam tuc » cam xuc, cam tu, dam thuc
hieu va » lieu va, hieu qua
hanh xa » hanh va, hanh ma, hanh xu
va dan » ca dan, va dao, va dau
lam va » nam va, dam va, lam ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach thi hanh xa hoi. hieu va ((cam tuc) or (nam thuc)) ((va hanh) or (va dan)) lam va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thi hanh xa hoi. hieu va ((cam tuc) OR (nam thuc)) ((va hanh) OR (va dan)) lam va trien.
• Adding a wildcard symbol may retrieve word variants: su sach thi hanh xa hoi. hieu va ((cam tuc) or (nam thuc)) ((va hanh) or (va dan)) lam va trien*.