Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cau triet » cau trieu, su triet, va triet
hanh van » thanh van, khanh van, hanh va
hieu van » hieu va, thien van, lieu va
kho tang » cao tang
van cam » van nam, van lam, van cau
va hanh » van hanh, va thanh, va danh
ky tang » ky nang, ky dang, ky trong
te sach » toc sach
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((ky tang) or (kho tang)) xa hoi. hieu van cam xuc va hanh van ((cau triet) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky tang) OR (kho tang)) xa hoi. hieu van cam xuc va hanh van ((cau triet) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky tang) or (kho tang)) xa hoi. hieu van cam xuc va hanh van ((cau triet) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky tang) or (kho tang)) xa hoi. hieu van cam xuc va hanh van ((cau triet) OR (cua triet))*.