Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
khoan hoi » khoan nhoi, khoa hoi, khoa hoc
thi cham » thi hai, toc cham, thi ha
cham luc » cham soc, nhan luc, cham cuu
hieu thi » sieu thi, hieu chi, hiep thi
va chua » vua chua, ca chua, a chua
luc van » luoc van, luu van, duc van
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
hoa hoi » khoa hoi, hoa hoc, hoa doi
ty dong » tay dong, tu dong, ly dong
va chu » va che, va cau, va chi

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty dong ((hoa hoi) or (khoan hoi)). hieu thi cham luc van thanh ((va chua) or (va chu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty dong ((hoa hoi) OR (khoan hoi)). hieu thi cham luc van thanh ((va chua) OR (va chu)) tre.
• Adding a wildcard symbol may retrieve word variants: so sach ty dong ((hoa hoi) or (khoan hoi)). hieu thi cham luc van thanh ((va chua) or (va chu)) tre*.