Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu viec » nhieu viec, hieu ve, sieu viet
hieu vien » hieu hien, thieu nien, hieu tieng
hanh lai » hanh lam, hanh tai, thanh lap
lai cua » dai cua, hai cua, lai chau
va hanh » van hanh, va thanh, va danh
cac tuc » cac toc, cac tu, cac tac
so sach » so sanh, bo sach, co sach
lang xa » lang ha, dang xay, lang van
vu sach » vu bach, su sach, vu khach
tuc va » thuc va, truc va, tuc xa
y lang » o lang, _ lang, tay lang

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

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