Perhaps you should try some spelling variations:
sach tham » sach nha
sach thu » sach thue, sach thieu, cach thuc
hanh doi » thanh doi, hanh noi, hang doi
doi cua » dai cua, hoi cua
qua cac » cua cac
nang xa » nang x, lang xa, nang ma
loc va » hoc va, luc va
tuc va » thuc va, truc va, tuc xa
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: thuat ((sach thu) or (sach tham)) nang xa hoi. hieu qua cac ((loc va) or (tuc va)) hanh doi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((sach thu) OR (sach tham)) nang xa hoi. hieu qua cac ((loc va) OR (tuc va)) hanh doi cua te.
• Adding a wildcard symbol may retrieve word variants: thuat ((sach thu) or (sach tham)) nang xa hoi. hieu qua cac ((loc va) or (tuc va)) hanh doi cua te*.