Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
so sanh » do sanh
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
van cam » van nam, van lam, van cau
ve cua » le cua, de cua, te cua

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

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