Perhaps you should try some spelling variations:
thieu nien » thien nhien
hieu vien » hieu hien, hieu viec, hieu tieng
cua triet » cua viet, su triet, va triet
quang xa » quan xa, quang ma, quang va
ly quang » le quang, vu quang
hanh dai » hanh tai, hanh dao, vanh dai
sanh ly » sinh ly, doanh ly, khanh ly
so sanh » do sanh
thu va » thuc va, thue va, thu ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh ly quang xa hoi. ((hieu vien) OR (thieu nien)) cac ((thu va) or (tu va)) hanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ly quang xa hoi. ((hieu vien) OR (thieu nien)) cac ((thu va) OR (tu va)) hanh dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh ly quang xa hoi. ((hieu vien) OR (thieu nien)) cac ((thu va) or (tu va)) hanh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: so sanh ly quang xa hoi. ((hieu vien) OR (thieu nien)) cac ((thu va) or (tu va)) hanh dai cua triet*.