Perhaps you should try some spelling variations:
sach thue » sach thieu, sach tham, cach thuc
thanh loi » thanh hoa, thanh hai, thanh lap
sach thu » sach thieu, sach tham, cach thuc
cau tren » dau tren, ca tren, cau treo
va thanh » gia thanh, ban thanh, va tinh
cu tren » tu tren, dua tren
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
cam tu » cam thu, nam tu, dam tu
va cam » va cham, va cac, va cao

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 thu) OR (sach thue)) nang xa hoi. hieu va cam tu va thanh loi ((cau tren) OR (cu tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach thu) OR (sach thue)) nang xa hoi. hieu va cam tu va thanh loi ((cau tren) or (cu tren))~".
• Adding a wildcard symbol may retrieve word variants: te ((sach thu) OR (sach thue)) nang xa hoi. hieu va cam tu va thanh loi ((cau tren) or (cu tren))*.