Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
hanh dai » hanh tai, hanh dao, vanh dai
su triet » su viet, su tien, ve triet
so sanh » do sanh
sanh la » sanh ca, sanh va, hanh lam
la quan » va quan, luat quan, van quan
quan xa » quan ha, quan va, quan cua
thu va » thuc va, thue va, thu ha
dai su » dai sua, dai so, dan su

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 la quan xa hoi. hieu vien cac ((thu va) or (tu va)) hanh dai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh la quan xa hoi. hieu vien cac ((thu va) OR (tu va)) hanh dai su triet.
• Adding a wildcard symbol may retrieve word variants: so sanh la quan xa hoi. hieu vien cac ((thu va) or (tu va)) hanh dai su triet*.