Perhaps you should try some spelling variations:
chat triet » chet triet, phat trien, chat thien
lang van » dang van, tang van, hoang van
lam chat » luan chat, cao chat, ly chat
thu sach » tu sach, thuat sach, thuoc sach
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
lang xa » lang ha, dang xay
va dan » ca dan, va dao, va dau
va bac » van bac, va cac, va bai

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 va bac xuc ((va hanh) or (va dan)) lam chat triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((lang xa) OR (lang van)) hoi. hieu va bac xuc ((va hanh) OR (va dan)) lam chat triet.
• Adding a wildcard symbol may retrieve word variants: thu sach y ((lang xa) or (lang van)) hoi. hieu va bac xuc ((va hanh) or (va dan)) lam chat triet*.