Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
chat tuc » chat xuc, luat tuc, chat huu
sach thu » sach thue, sach thieu, sach tham
va hanh » van hanh, va danh, ban hanh
va chat » van chat, va phat, cao chat
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
cach xu » cach tu, cach su, mach xu
cua tre » cua te, cuu tre, cua triet
va cua » va chua, via cua, ca cua

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 thu) OR (cach xu)) nang xa hoi. hieu va chat tuc ((va hanh) OR (va thanh)) va cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach thu) or (cach xu)) nang xa hoi. hieu va chat tuc ((va hanh) OR (va thanh)) va cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach thu) or (cach xu)) nang xa hoi. hieu va chat tuc ((va hanh) OR (va thanh)) va cua tre*.