Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
danh doi » danh di, thanh doi, dung doi
ly quang » le quang, vu quang
ly vang » ly hang, ly van
van bac » van ban, van bao, dan bac
van hac » van hoc, van ha, van hai
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
su sach » so sach, vu sach
co hoi » co hoc, co loi
doi su » oi su, don su, voi su

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 ((ly quang) or (ly vang)) co hoi. hieu ((van bac) or (van hac)) thuc va danh doi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ly quang) OR (ly vang)) co hoi. hieu ((van bac) OR (van hac)) thuc va danh doi su triet.
• Adding a wildcard symbol may retrieve word variants: su sach ((ly quang) or (ly vang)) co hoi. hieu ((van bac) or (van hac)) thuc va danh doi su triet*.