Perhaps you should try some spelling variations:
thien van » thi van
su sach » so sach, vu sach
bo sach » co sach, hoc sach
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
hieu va » lieu va, hieu qua
cac tac » cac toc, cac bac, cac dac
vi cua » vai cua, di cua
tac va » tac da, tac xa, tuc va
cua te » cua tu
v nang » va nang, vu nang, van nang
x hoi » xa hoi, o hoi, x ho

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 (bo sach)) v nang x hoi. ((hieu va) or (thien van)) cac tac va danh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (bo sach)) v nang x hoi. ((hieu va) OR (thien van)) cac tac va danh vi cua te.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (bo sach)) v nang x hoi. ((hieu va) or (thien van)) cac tac va danh vi cua te*.