Perhaps you should try some spelling variations:
kho tang » cao tang
va thanh » gia thanh, ban thanh, va tinh
va khanh » van khanh, vu khanh, va hanh
ky tang » ky nang, ky dang, ky trong
dinh cu » dinh cuu, dinh chuc, dinh chau
hieu ve » hieu va, hieu van
cam hoc » cao hoc, am hoc, cam hoa
tu sac » tu sach, tu cac, tu san
ve cam » ve cham, ve cac, va cam
cu tre » cu tren, cua tre, cuu tre

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) OR (kho tang)) xa hoi. hieu ve cam hoc ((va khanh) or (va thanh)) dinh cu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ((ky tang) OR (kho tang)) xa hoi. hieu ve cam hoc ((va khanh) OR (va thanh)) dinh cu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ((ky tang) OR (kho tang)) xa hoi. hieu ve cam hoc ((va khanh) or (va thanh)) dinh cu tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ((ky tang) OR (kho tang)) xa hoi. hieu ve cam hoc ((va khanh) or (va thanh)) dinh cu tre*.