Perhaps you should try some spelling variations:
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty tang » tay tang, ty xang, ty hang
tang co » tang cho, nang co, tang o
hieu ve » hieu va, hieu van
cac vuc » cac nuoc, cac vung, cac cuoc
vuc van » duc van, luc van, thuc van
cua cau » cua cac, cua chu, cua cay
ve cac » va cac, vien cac
anh vi » hanh vi, anh ve, anh vu
anh va » hanh va

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 co hoc. hieu ve cac vuc van ((anh vi) OR (anh va)) cua cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty tang co hoc. hieu ve cac vuc van ((anh vi) OR (anh va)) cua cau*".