Perhaps you should try some spelling variations:
sach tren » sach tranh
sach tien » sach thieu
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, lieu va
lam luc » lao luc, lam duoc
van lam » van nam
cuu tre » cua tre, cau tren, cau treo
nang xa » nang x, lang xa, nang ma
luc va » duc va, tuc va, loc va
cua te » cua tu

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 tren) or (sach tien)) nang xa hoi. hieu van lam luc va thanh vi ((cua te) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach tren) OR (sach tien)) nang xa hoi. hieu van lam luc va thanh vi ((cua te) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: su ((sach tren) or (sach tien)) nang xa hoi. hieu van lam luc va thanh vi ((cua te) or (cuu tre))*.