Perhaps you should try some spelling variations:
te sach » toc sach
va danh » va dinh, va dan, va hanh
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
nang ma » tang ma, sang ma, nang cao
ve cac » va cac, vien cac
xuc va » duc va, tuc va, luc va
di cuu » di cua, dinh cuu
di cau » da cau, diem cau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang x) OR (nang ma)) hoi. hieu ve cac xuc va danh ((di cuu) OR (di cau)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((nang x) or (nang ma)) hoi. hieu ve cac xuc va danh ((di cuu) OR (di cau)) tre~".
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang x) or (nang ma)) hoi. hieu ve cac xuc va danh ((di cuu) OR (di cau)) tre*.