Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
thieu khang » chieu khong
tham thuc » nham thuc, pham thuc, tam thuc
cua triet » cua viet, su triet, va triet
hanh tai » thanh tai, hang tai, han tai
su sach » so sach, vu sach
va tham » van tham, va cham, va thanh
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
tai cua » thai cua, tai cuc, tri cua

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 ((thieu quang) or (thieu khang)) xa hoi. lieu va tham thuc va hanh tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((thieu quang) OR (thieu khang)) xa hoi. lieu va tham thuc va hanh tai cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach ((thieu quang) or (thieu khang)) xa hoi. lieu va tham thuc va hanh tai cua triet*.