Perhaps you should try some spelling variations:
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
hang xa » hoang xa, hang ca, lang xa
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
va cao » va cac, va co, va dao
vi cua » vai cua, di cua
cua te » cua tu
su va » su van, tu 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 tu ((hang xa) or (hang va)) hoi. hieu va cao su va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu ((hang xa) OR (hang va)) hoi. hieu va cao su va hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: te sach tu ((hang xa) or (hang va)) hoi. hieu va cao su va hanh vi cua te*.