Perhaps you should try some spelling variations:
vao triet » va triet, mao triet, va trien
sach ya » sach xa, sach ha, sach va
nang ma » tang ma, sang ma, nang cao
cam tuc » cam xuc, cam tu, nam thuc
va nang » van nang, da nang, cam nang
nang di » nang du, hang di, nang ji
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((sach y) or (sach ya)) nang ma hoi. ((hieu qua) or (lieu va)) cam tuc va nang di vao triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach y) OR (sach ya)) nang ma hoi. ((hieu qua) OR (lieu va)) cam tuc va nang di vao triet.
• Adding a wildcard symbol may retrieve word variants: toc ((sach y) or (sach ya)) nang ma hoi. ((hieu qua) or (lieu va)) cam tuc va nang di vao triet*.