Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
sach tu » sach thu, cach tu, sach ty
tu sach » thu sach, su sach, te sach
tu nang » tru nang, tu nong, tu nano
ve bac » ve cac, ve ban, he bac
ve bao » te bao, va bao
do van » dao van, vo van, so van
vi cua » vai cua
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu nang x hoi. hieu ((ve bac) OR (ve bao)) do van hanh ((vi cua) OR (di cua)) triet~.
• Adding a wildcard symbol may retrieve word variants: tu sach tu nang x hoi. hieu ((ve bac) or (ve bao)) do van hanh ((vi cua) or (di cua)) triet*.