Perhaps you should try some spelling variations:
ve triet » va trien, su triet
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
hieu ve » hieu van
tu sach » thu sach, su sach, tu cach
lang xa » lang ha, dang xay, lang van
te sach » toc sach
y lang » o lang, _ lang, tay lang
tuc va » thuc va, truc va, tuc xa
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: ((tu sach) or (te sach)) y lang xa hoi. ((hieu ve) or (hieu va)) cam tuc va hanh vi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) y lang xa hoi. ((hieu ve) OR (hieu va)) cam tuc va hanh vi ve triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) y lang xa hoi. ((hieu ve) or (hieu va)) cam tuc va hanh vi ve triet*.