Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
thuc dan » thuc hanh, hoc dan
hieu van » hieu va, thien van, lieu va
hanh va » hang va, hanh vi
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
dang ha » dong ha, dung ha, lang ha
ky dang » ky nang, ky danh
van am » van nam, van lam, van dam
ha hoi » hoa hoi, ha noi, xa hoi

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky dang ha hoi. hieu van am ((thuc dan) OR (thuc vat)) hanh va ((cua triet) OR (su triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky dang ha hoi. hieu van am ((thuc dan) or (thuc vat)) hanh va ((cua triet) OR (su triet))~".
• Adding a wildcard symbol may retrieve word variants: vu sach ky dang ha hoi. hieu van am ((thuc dan) or (thuc vat)) hanh va ((cua triet) OR (su triet))*.