Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
hieu van » hieu va, thien van, lieu va
hanh dai » hanh tai, hanh dao, vanh dai
thuc dan » thuc hanh, hoc dan
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
van am » van nam, van lam, van dam
sac ky » cac ky, sai ky
ha hoi » hoa hoi, ha noi, xa hoi
su sac » su sach, su cac, su xac

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 lang ha hoi. hieu van am ((thuc dan) or (thuc vat)) hanh dai ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky lang ha hoi. hieu van am ((thuc dan) OR (thuc vat)) hanh dai ((cua triet) OR (su triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky lang ha hoi. hieu van am ((thuc dan) or (thuc vat)) hanh dai ((cua triet) OR (su triet))*".