Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
vu khanh » vu thanh, van khanh, duy khanh
hoc ngoc » hoc nuoc, ho ngoc, loc ngoc
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu te » hieu ve, hien te, hieu he
ngoc va » nuoc va, ngoc ha, goc va
va hanh » van hanh, va thanh, va danh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (vu khanh)) ky nang xa hoi. hieu te hoc ngoc va hanh vi ((cua triet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (vu khanh)) ky nang xa hoi. hieu te hoc ngoc va hanh vi ((cua triet) OR (cua vat)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (vu khanh)) ky nang xa hoi. hieu te hoc ngoc va hanh vi ((cua triet) or (cua vat))*.