Perhaps you should try some spelling variations:
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
cac tuc » cac toc, cac tac, cac nuoc
cu tren » tu tren, dua tren
cac tu » cac thu, cach tu, cac du
xa dan » ca dan, xa dai, va dan
ca cu » ca cua, cua cu, ca cau

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 ky nang cao hoi. hieu ve ((cac tuc) or (cac tu)) xa dan ca cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang cao hoi. hieu ve ((cac tuc) OR (cac tu)) xa dan ca cu tren.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang cao hoi. hieu ve ((cac tuc) or (cac tu)) xa dan ca cu tren*.