Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
lang van » dang van, tang van, hoang van
hieu van » thien van, lieu va, hieu ve
ve triet » va trien, su triet
lang xa » lang ha, dang xay
hieu va » lieu va, hieu qua
cau luc » cau truc, cau phuc
va hanh » van hanh, va thanh, va danh
luc va » duc va, tuc va, loc va
vi ve » va ve, gi ve, ve ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y ((lang xa) or (lang van)) hoi. ((hieu van) or (hieu va)) cau luc va hanh vi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((lang xa) OR (lang van)) hoi. ((hieu van) OR (hieu va)) cau luc va hanh vi ve triet.
• Adding a wildcard symbol may retrieve word variants: thu sach y ((lang xa) or (lang van)) hoi. ((hieu van) or (hieu va)) cau luc va hanh vi ve triet*.