Perhaps you should try some spelling variations:
cham hoc » cham soc, chat hoc, cham hoi
phan dau » phan tu, hang dau
cau treo » cau theo, cau tren, cau triet
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu su » hieu sau, tieu su, hieu so
su cham » su pham, tu cham, vu cham
va phan » van phan, va phat, va phap
cuu tre » cua tre, cau tren
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky lang xa hoi. hieu su cham hoc va phan dau ((cuu tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang xa hoi. hieu su cham hoc va phan dau ((cuu tre) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: te sac ky lang xa hoi. hieu su cham hoc va phan dau ((cuu tre) or (cau treo))*.