Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu hanh » thu thanh, thuy hanh, thi hanh
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, te sach
va nam » van nam, ha nam, va nay
ve nam » he nam, le nam, te nam

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