Perhaps you should try some spelling variations:
khanh dinh » khanh linh, khanh vinh, hanh dinh
va khanh » van khanh, va thanh, vu khanh
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
cam hoc » am hoc, cam hoa, cac hoc
cao hoc » co hoc, cho hoc, chat hoc
cua tre » cua te, cuu tre, cua triet
tu van » tu va
cu tre » cu tren, cuu tre, cu tri

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

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