Perhaps you should try some spelling variations:
khanh dinh » khanh linh, khanh vinh, hanh dinh
va khanh » van khanh, va thanh, vu khanh
cao hoc » co hoc, cho hoc, chat hoc
ky lang » ky nang, ky dang, tay lang
dinh cu » dinh cuu, dinh chuc, dinh chau
ky tang » ky nang, ky dang, kho tang
hieu ve » hieu va, hieu van
cam hoc » am hoc, cam hoa, cac hoc
tu san » thu san, tu ban, tu can
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 san ((ky lang) OR (ky tang)) xa hoi. hieu ve ((cam hoc) or (cao hoc)) va khanh dinh cu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ((ky lang) OR (ky tang)) xa hoi. hieu ve ((cam hoc) OR (cao hoc)) va khanh dinh cu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ((ky lang) OR (ky tang)) xa hoi. hieu ve ((cam hoc) or (cao hoc)) va khanh dinh cu tre".
• Adding a wildcard symbol may retrieve word variants: tu san ((ky lang) OR (ky tang)) xa hoi. hieu ve ((cam hoc) or (cao hoc)) va khanh dinh cu tre*.