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
va lang » va nang, hoa lang
su sach » so sach, vu sach
lam tuc » lam thuoc, lam truoc, luat tuc
van lam » van nam
nang ma » tang ma, sang ma, nang cao
va dang » van dang, va nang, da dang
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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 y nang ma 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 y nang ma 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 y nang ma hoi. hieu van lam tuc ((va dang) or (va lang)) hai ((cau treo) or (cau triet))*.