Perhaps you should try some spelling variations:
cac tuc » cac toc, cac tu, cac tac
hieu va » lieu va, hieu qua
sach ky » sac ky, sach ty, sach kem
hieu ve » hieu van
cua tre » cua te, cuu tre, cua triet
sang ma » tang ma, nang ma, sang tao
ma hoi » mai hoi, xa hoi, ma hoa
tuc ca » tuc cac, tuc cua, tuc xa
ca dan » cac dan, ca dao
dan vi » doan vi, don vi, dan va
vi cua » vai cua, di cua

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: tu ((sach ky) OR (sach y)) sang ma hoi. ((hieu ve) OR (hieu va)) cac tuc ca dan vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach y)) sang ma hoi. ((hieu ve) or (hieu va)) cac tuc ca dan vi cua tre*.