Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cay thuoc » cua thuoc, nam thuoc, va thuoc
hieu vien » hieu hien, hieu viec, thieu nien
cay thuc » can thuc, day thuc, cach thuc
vu sach » vu bach, vu khach
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
su sach » so sach
vi cua » vai cua, di 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) or (vu sach)) ty nang xa hoi. hieu vien ((cay thuc) OR (cay thuoc)) va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ty nang xa hoi. hieu vien ((cay thuc) OR (cay thuoc)) va hanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ty nang xa hoi. hieu vien ((cay thuc) OR (cay thuoc)) va hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ty nang xa hoi. hieu vien ((cay thuc) OR (cay thuoc)) va hanh vi cua triet*.