Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
cac toc » cac toi, cac nuoc, cac thoi
hang vi » hang va, hanh vi, khang voi
hang di » hang doi, hang dien, hang dich
so sanh » do sanh
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
sanh y » sinh y, anh y, hanh y
cac tu » cac thu, cach tu, cac du
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, v nang

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: so sanh y nang ma hoi. hieu va ((cac toc) OR (cac tu)) van ((hang di) OR (hang vi)) su triet~.
• Adding a wildcard symbol may retrieve word variants: so sanh y nang ma hoi. hieu va ((cac toc) or (cac tu)) van ((hang di) or (hang vi)) su triet*.