Perhaps you should try some spelling variations:
sach tien » sach tren, 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
su sach » so sach, vu sach
cua tre » cua te, cua triet, dua tren
lam luc » lao luc, lam duoc
van lam » van nam
cuu tre » cau tren, cau treo
nang xa » lang xa, nang ma, mang xa
luc va » duc va, tuc va, loc va

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 tien ((nang xa) OR (nang x)) hoi. hieu van lam luc va thanh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tien ((nang xa) OR (nang x)) hoi. hieu van lam luc va thanh vi ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach tien ((nang xa) OR (nang x)) hoi. hieu van lam luc va thanh vi ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: su sach tien ((nang xa) OR (nang x)) hoi. hieu van lam luc va thanh vi ((cua tre) or (cuu tre))*.