Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hoc quoc » hoc nuoc, hoc duoc, hoc thuoc
thu dang » thu hang, thu bang, thu dong
doi cua » dai cua, hoi cua
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
su sach » vu sach
hieu va » lieu va, hieu qua
dang xa » dang xay, lang xa, dang ha
so sach » so sanh, bo sach, co sach
va hoc » van hoc

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 sach)) thu dang xa hoi. hieu va hoc quoc ((va hanh) or (va danh)) doi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) thu dang xa hoi. hieu va hoc quoc ((va hanh) OR (va danh)) doi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) thu dang xa hoi. hieu va hoc quoc ((va hanh) or (va danh)) doi cua triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) thu dang xa hoi. hieu va hoc quoc ((va hanh) or (va danh)) doi cua triet*.