Perhaps you should try some spelling variations:
sach tham » sach nha
tan thanh » tran thanh, tang thanh, toan thanh
dua tren » dung tren
thanh ve » hanh ve, thanh va, thanh vien
cam duc » cam xuc, cao duc, pham duc
cuu tre » cua tre, cau tren, cau treo
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ve cam » ve cham, ve cac, va cam

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 ty) or (sach tham)) nang xa hoi. hieu ve cam duc tan thanh ve ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach tham)) nang xa hoi. hieu ve cam duc tan thanh ve ((dua tren) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) or (sach tham)) nang xa hoi. hieu ve cam duc tan thanh ve ((dua tren) or (cuu tre))*.