Perhaps you should try some spelling variations:
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
tu hang » thu hang, tu hanh, tu hung
hang co » hang cho, hang ca, nang co
hieu ve » hieu va, hieu van
vuc van » luc van, thuc van, chuc van
duc van » duc va, duc tan, duc manh
cua cau » cua cac, cua chu, cua cay
ve cac » va cac, vien cac
vi cua » vai cua, di cua

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 tu hang co hoc. hieu ve cac ((vuc van) or (duc van)) hanh vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu hang co hoc. hieu ve cac ((vuc van) OR (duc van)) hanh vi cua cau*.