Perhaps you should try some spelling variations:
sach thi » sach thu, sach thieu, sach tham
sach tai » sach bai, sach tham, sach dao
hang xa » hoang xa, hang va, hang ca
van cam » van lam, van cau, van dam
va hanh » van hanh, va thanh, va danh
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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 thi) OR (sach tai)) hang xa hoi. hieu ((van cam) or (van nam)) xuc va hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach thi) OR (sach tai)) hang xa hoi. hieu ((van cam) OR (van nam)) xuc va hanh vi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach thi) OR (sach tai)) hang xa hoi. hieu ((van cam) or (van nam)) xuc va hanh vi cua tu".
• Adding a wildcard symbol may retrieve word variants: te ((sach thi) OR (sach tai)) hang xa hoi. hieu ((van cam) or (van nam)) xuc va hanh vi cua tu*.