Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
cau treo » cau theo, cau tren, cau trieu
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach y, sach ty
va lang » va nang, hoa lang
su sach » so sach, vu sach
va dang » van dang, va nang, da dang
lam tuc » lam thuoc, lam truoc, luat tuc
van lam » van nam
cao hoi » cau hoi, co hoi, cao hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang cao hoi. hieu van lam tuc ((va dang) or (va lang)) hai ((cau treo) or (cau triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang cao hoi. hieu van lam tuc ((va dang) OR (va lang)) hai ((cau treo) OR (cau triet)).
• Adding a wildcard symbol may retrieve word variants: su sach ky nang cao hoi. hieu van lam tuc ((va dang) or (va lang)) hai ((cau treo) or (cau triet))*.