Perhaps you should try some spelling variations:
thien van » thi van
ban hanh » ban hang
hanh dam » thanh dam, hanh lam, hanh nam
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
sach tu » sach thu, cach tu, sach ty
tu nong » tu dong, tu cong, tu tong
nong xa » song xa, dong xa, nong va
hieu va » lieu va, hieu qua
xu ban » xuc ban, tu ban, vu ban
dam va » dam van, nam va, dam 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 tu nong xa hoi. ((hieu va) or (thien van)) chao xu ban hanh dam va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tu nong xa hoi. ((hieu va) OR (thien van)) chao xu ban hanh dam va triet.
• Adding a wildcard symbol may retrieve word variants: su sach tu nong xa hoi. ((hieu va) or (thien van)) chao xu ban hanh dam va triet*.