Perhaps you should try some spelling variations:
khanh dinh » khanh linh, khanh vinh, hanh dinh
hieu van » hieu va, thien van, lieu va
vu khanh » vu thanh, van khanh, duy khanh
cua tre » cua te, cuu tre, cua triet
cao hoc » co hoc, cho hoc, chat hoc
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
cu tre » cu tren, cuu tre, cu tri
tu ban » thu ban, te ban
ban ky » van ky, dan ky
am hoc » ad hoc

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

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