Perhaps you should try some spelling variations:
bat thanh » ban thanh, bac thanh, dat thanh
thanh vi » hanh vi, thanh va, thanh ve
sach tai » sach bai, sach tham, sach dao
sach thi » sach thu, sach thieu, sach tham
luc bat » suc bat, luc nhat, luat bat
van cam » van nam, van lam, van dam
van cau » van dau, van hau, van chat
nang xa » nang x, lang xa, nang ma
vi cua » vai cua, di cua
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: te ((sach thi) or (sach tai)) nang xa hoi. hieu ((van cam) OR (van cau)) luc bat thanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach thi) OR (sach tai)) nang xa hoi. hieu ((van cam) OR (van cau)) luc bat thanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach thi) or (sach tai)) nang xa hoi. hieu ((van cam) OR (van cau)) luc bat thanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: te ((sach thi) or (sach tai)) nang xa hoi. hieu ((van cam) OR (van cau)) luc bat thanh vi cua te*.