Perhaps you should try some spelling variations:
sach thue » sach thieu, sach tham, cach thuc
sach thu » sach thieu, sach tham, cach thuc
ban hanh » ban hang
nang xa » nang x, lang xa, nang ma
cam duc » cam xuc, cao duc, pham duc
duc ban » duc tan, duc van, dua ban
hanh va » hang va, hanh vi
dau tre » dau tren, dau tien, cau tren
va cam » va cham, va cac, va cao
va dau » va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach thue) or (sach thu)) nang xa hoi. lieu va cam duc ban hanh va dau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach thue) OR (sach thu)) nang xa hoi. lieu va cam duc ban hanh va dau tre.
• Adding a wildcard symbol may retrieve word variants: thu ((sach thue) or (sach thu)) nang xa hoi. lieu va cam duc ban hanh va dau tre*.