Perhaps you should try some spelling variations:
sach tien » sach tren, sach thieu
tien nang » thien nang, trien nang, tin nang
va thanh » ban thanh, va tinh, le thanh
cua tre » cua te, cua triet, dua tren
su sach » so sach, vu sach
lam luc » lao luc, lam duoc
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
cuu tre » cau tren, cau treo
va lam » van lam, va lap

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 hoi. hieu va lam luc ((va thanh) OR (gia 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 hoi. hieu va lam luc ((va thanh) OR (gia 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 hoi. hieu va lam luc ((va thanh) OR (gia thanh)) vi ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: su sach tien nang xa hoi. hieu va lam luc ((va thanh) OR (gia thanh)) vi ((cua tre) or (cuu tre))*.