Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
cau treo » cau theo, cau tren, cau trieu
toc sac » toc sach, toc san, hoc sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
sac ky » cac ky, sai ky
ve cau » ke cau, va cau, ve cac
va dan » ca dan, va dao, va dau
dan vi » doan vi, don vi, dan va

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: toc sac ky nang xa hoi. hieu ve cau tao va dan vi ((cau treo) OR (cau triet))~.
• Adding a wildcard symbol may retrieve word variants: toc sac ky nang xa hoi. hieu ve cau tao va dan vi ((cau treo) or (cau triet))*.