Perhaps you should try some spelling variations:
qua cham » qua hai, qua cac, va cham
dang xay » dang van, van xay
hanh di » hanh vi, hanh de, hang di
sach ty » sach y, sach tu, sach thu
te sach » toc sach
tang ma » mang may, tang van
cuu tre » cua tre, cau tren, cau treo
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
di cuu » di cau, di cua, dinh cuu

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 ((tang ma) or (dang xay)) hoi. hieu qua cham ((xuc va) or (luc va)) hanh di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((tang ma) OR (dang xay)) hoi. hieu qua cham ((xuc va) OR (luc va)) hanh di cuu tre.
• Adding a wildcard symbol may retrieve word variants: te sach ty ((tang ma) or (dang xay)) hoi. hieu qua cham ((xuc va) or (luc va)) hanh di cuu tre*.