Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
sach thu » sach thue, sach thieu, sach tham
va thanh » gia thanh, va tinh, le thanh
doi cuu » doi cua, doi cuoc
cam tuc » cam xuc, cam tu, nam thuc
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
cach tu » cach thuc
va cam » va cham, va cac, va cao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach thu) or (cach tu)) nang xa hoi. hieu va cam tuc ((va thanh) OR (ban thanh)) doi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach thu) OR (cach tu)) nang xa hoi. hieu va cam tuc ((va thanh) OR (ban thanh)) doi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach thu) or (cach tu)) nang xa hoi. hieu va cam tuc ((va thanh) OR (ban thanh)) doi cuu tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach thu) or (cach tu)) nang xa hoi. hieu va cam tuc ((va thanh) OR (ban thanh)) doi cuu tre*.