Perhaps you should try some spelling variations:
qua cham » qua hai, qua cac, va cham
cham vuc » cham soc, pham duc, cham cuu
van hanh » van thanh, ban hanh, van anh
hanh hoi » hanh thoi, hanh noi, hanh hoa
sach ty » sach tu, sach thu, xach tay
van hoi » van hoc, van hoe, van loi
vuc van » duc van, luc van, thuc van
hoi cua » hoi chuc
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 ty) or (sach y)) lang ((van hoi) OR (van hoa)). hieu qua cham vuc van hanh hoi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach y)) lang ((van hoi) OR (van hoa)). hieu qua cham vuc van hanh hoi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) or (sach y)) lang ((van hoi) OR (van hoa)). hieu qua cham vuc van hanh hoi cua te".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach y)) lang ((van hoi) OR (van hoa)). hieu qua cham vuc van hanh hoi cua te*.