Perhaps you should try some spelling variations:
te sach » toc sach
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
sach tu » sach thu, cach tu, sach ty
hieu ve » hieu va, hieu van
huu tre » huu tri, cuu tre, huu them
lang xa » lang ha, dang xay, lang van
cac co » cac cong
va huu » vu huu
ve cac » va cac, vien cac

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 ((lang xa) or (nang x)) hoi. hieu ve cac co ((va hanh) or (va danh)) va huu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu ((lang xa) OR (nang x)) hoi. hieu ve cac co ((va hanh) OR (va danh)) va huu tre.
• Adding a wildcard symbol may retrieve word variants: te sach tu ((lang xa) or (nang x)) hoi. hieu ve cac co ((va hanh) or (va danh)) va huu tre*.