Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu vien » hieu hien, hieu viec, thieu nien
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 toc » cac toi, cac nuoc, cac thoi
so sach » so sanh, bo sach, co sach
vu sach » vu bach, su sach, vu khach
nang xa » nang x, lang xa, nang ma
cac tuc » cac tu, cac tac, cac nuoc
y nang » ky nang, ly nang, v nang

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