Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
hanh lam » thanh lap, hanh va, dinh lam
thi hanh » thi thanh
cac tuc » cac toc, cac tu, cac tac
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
tuc va » thuc va, truc va, tuc xa

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