Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nam thuc » nam thuoc, am thuc, nam thu
van hanh » van thanh, ban hanh, van anh
thuc van » thuc vat, thuc dan, thuc va
nang ho » nang hoc, nang co, tang ho
hieu ve » hieu va, hieu van
hanh di » hanh vi, hanh de, hang di
ho hoi » hoc hoi, hoa hoi, hoi hoi
ve nam » he nam, va nam, le nam
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 ((((sac ky) OR (sai ky))) or (cac ky)) nang ho hoi. hieu ve nam thuc van hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((((sac ky) OR (sai ky))) OR (cac ky)) nang ho hoi. hieu ve nam thuc van hanh di cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((((sac ky) OR (sai ky))) or (cac ky)) nang ho hoi. hieu ve nam thuc van hanh di cua triet*".