Perhaps you should try some spelling variations:
cua triet » su triet, va triet
hieu van » hieu va, thien van, lieu va
thuc dan » thuc hanh, hoc dan
hanh vai » hanh vi, hanh va, hanh tai
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
lang ha » long ha
y lang » o lang, _ lang, tay lang
ha hoi » hoa hoi, ha noi, xa hoi
van am » van nam, van lam, van dam

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