Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
doanh van » doan van, doanh va, doanh ban
su triet » su viet, su tien, ve triet
hieu van » hieu va, thien van, lieu va
danh vai » danh sai, danh va, dang van
van cam » van nam, van lam, van cau
sach ky » sac ky, sach y, sach ty
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
tu sach » thu sach, su sach, te 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: tu sach ky dang xa hoi. hieu van cam xuc va ((danh vai) or (doanh van)) ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xa hoi. hieu van cam xuc va ((danh vai) OR (doanh van)) ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang xa hoi. hieu van cam xuc va ((danh vai) or (doanh van)) ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xa hoi. hieu van cam xuc va ((danh vai) or (doanh van)) ((cua triet) OR (su triet))*.