Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
dua tren » dung tren
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
xua ban » xuat ban, cua ban, mua ban
qua ban » cua ban, qua quan
tu sac » tu sach, tu cac, tu san
anh ve » hanh ve, anh va, anh viet
sac ky » cac ky, sai ky
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: tu sac ky tang ma hoi. hieu van nam ((xua ban) or (qua ban)) anh ve ((dua tren) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky tang ma hoi. hieu van nam ((xua ban) OR (qua ban)) anh ve ((dua tren) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky tang ma hoi. hieu van nam ((xua ban) or (qua ban)) anh ve ((dua tren) or (cua triet))*.