Perhaps you should try some spelling variations:
va thanh » ban thanh, va tinh, le thanh
cau tren » cu tren, dau tren, ca tren
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
nang xa » nang x, lang xa, nang ma
cam duc » cam xuc, cao duc, pham duc
cuu tre » cua tre, cau treo
va cam » va cham, va cac, va cao

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: te sach tu nang xa hoi. lieu va cam duc ((va thanh) OR (gia thanh)) tai ((cuu tre) OR (cau tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu nang xa hoi. lieu va cam duc ((va thanh) or (gia thanh)) tai ((cuu tre) OR (cau tren))~".
• Adding a wildcard symbol may retrieve word variants: te sach tu nang xa hoi. lieu va cam duc ((va thanh) or (gia thanh)) tai ((cuu tre) OR (cau tren))*.