Perhaps you should try some spelling variations:
kem phat » te phat, de phat, tam phat
toc sach » hoc sach, doc sach, thuoc sach
thi hanh » thi thanh
nam thuc » nam thuoc, am thuc, nam thu
cam tuc » cam xuc, cam tu, dam thuc
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
hanh xa » hanh va, hanh ma, hanh xu

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) or (toc sach)) thi hanh xa hoi. hieu va ((cam tuc) OR (nam thuc)) va hanh kem phat trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (toc sach)) thi hanh xa hoi. hieu va ((cam tuc) OR (nam thuc)) va hanh kem phat trien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (toc sach)) thi hanh xa hoi. hieu va ((cam tuc) OR (nam thuc)) va hanh kem phat trien".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (toc sach)) thi hanh xa hoi. hieu va ((cam tuc) OR (nam thuc)) va hanh kem phat trien*.