Perhaps you should try some spelling variations:
sach thue » sach thieu, sach tham, cach thuc
sach thu » sach thieu, sach tham, cach thuc
cuc ban » cua ban, cac ban, cuu ban
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
luc ban » duc ban, luc bat, luc van
vi cua » vai cua, di cua
ve cac » va cac, vien cac
cua cu » cua chu, cua cau, cua su

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 (sach thue)) nang xa hoi. hieu ve cac ((luc ban) OR (cuc ban)) hanh vi cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach thu) OR (sach thue)) nang xa hoi. hieu ve cac ((luc ban) OR (cuc ban)) hanh vi cua cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach thu) or (sach thue)) nang xa hoi. hieu ve cac ((luc ban) OR (cuc ban)) hanh vi cua cu".
• Adding a wildcard symbol may retrieve word variants: te ((sach thu) or (sach thue)) nang xa hoi. hieu ve cac ((luc ban) OR (cuc ban)) hanh vi cua cu*.