Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuc dan » thuc hanh, hoc dan, thuc vat
dao hanh » dao thanh, dang hanh, ban hanh
dao hang » dao khang, dat hang, dai hang
thuc va » thuc vat, thuc day
hanh di » hanh vi, hanh de, hang di
su sach » so sach, vu sach
di cua » dai cua, doi cua, de 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 ((dao hang) OR (dao hanh)) xa hoi. lieu va cac ((thuc va) or (thuc dan)) hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((dao hang) OR (dao hanh)) xa hoi. lieu va cac ((thuc va) OR (thuc dan)) hanh di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((dao hang) OR (dao hanh)) xa hoi. lieu va cac ((thuc va) or (thuc dan)) hanh di cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((dao hang) OR (dao hanh)) xa hoi. lieu va cac ((thuc va) or (thuc dan)) hanh di cua triet*.