Perhaps you should try some spelling variations:
cham tuc » nham thuc, pham thuc, tham thuc
hieu va » lieu va, hieu qua
hieu ve » hieu van
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
tuc va » thuc va, truc va, tuc xa
va dan » ca dan, va dao, va dau
vi su » va su, ki su, oi su
ve su » va su

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach v nang ma hoi. ((hieu ve) OR (hieu va)) cham tuc va dan ((vi su) OR (ve su)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach v nang ma hoi. ((hieu ve) or (hieu va)) cham tuc va dan ((vi su) OR (ve su)) triet~".
• Adding a wildcard symbol may retrieve word variants: te sach v nang ma hoi. ((hieu ve) or (hieu va)) cham tuc va dan ((vi su) OR (ve su)) triet*.