Perhaps you should try some spelling variations:
thinh le » trinh ly
luoc van » luoc can, luoc va, luc van
te sach » toc sach
sach vu » sach va, sach tu, sach uu
luu van » cuu van, luan van, luu hanh
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
vu nang » vuc nang, va nang, vu dang
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
le cua » ly cua

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 vu nang ma hoi. ((hieu ve) or (hieu qua)) cam ((luoc van) or (luu van)) thinh le cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach vu nang ma hoi. ((hieu ve) OR (hieu qua)) cam ((luoc van) OR (luu van)) thinh le cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach vu nang ma hoi. ((hieu ve) or (hieu qua)) cam ((luoc van) or (luu van)) thinh le cua tre*.