Perhaps you should try some spelling variations:
sach tu » sach thu, cach tu, sach ty
nang xa » nang x, lang xa, nang ma
qua cac » cua cac
cac tuc » cac toc, cac tu, cac tac
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cua tre » cuu tre, cua triet, dua tren
tuc va » thuc va, truc va, tuc xa
cua te » cua tu

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