Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuc dan » thuc hanh, hoc dan, thuc vat
hieu van » hieu va, thien van, lieu va
thu sach » tu sach, thuat sach, thuoc sach
ky dang » ky nang, ky danh
thuc va » thuc vat, thuc day
ky sang » ky nang, ky tang, duy sang
van cam » van nam, van lam, van cau
ma hoi » mai hoi, xa hoi, ma hoa
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((ky sang) or (ky dang)) ma hoi. hieu van cam ((thuc va) or (thuc dan)) hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ky sang) OR (ky dang)) ma hoi. hieu van cam ((thuc va) OR (thuc dan)) hanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: thu sach ((ky sang) or (ky dang)) ma hoi. hieu van cam ((thuc va) or (thuc dan)) hanh vi cua triet*.