Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
hai cuc » tai cuc, hai cua, thai cua
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
va hai » van hai, va chai, va khai
cuc va » chuc va, duc va, cuu va
va cua » va chua, via cua, ca cua

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 y ((nang xa) or (van xay)) hoi. hieu va hai cuc va hanh va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang xa) OR (van xay)) hoi. hieu va hai cuc va hanh va cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang xa) or (van xay)) hoi. hieu va hai cuc va hanh va cua triet*.