Perhaps you should try some spelling variations:
bieu hien » dieu hien, dieu khien, bien phien
va triet » va thiet, va trien, ve triet
nang xa » nang x, lang xa, nang ma
su sach » so sach
cac tuc » cac toc, cac tac, cac nuoc
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
vu sach » vu bach, vu khach
cac tu » cac thu, cach tu, cac du
di va » dai va, di vao, doi va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (su sach)) ky nang xa hoi. bieu hien ((cac tuc) OR (cac tu)) va hanh di va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (su sach)) ky nang xa hoi. bieu hien ((cac tuc) OR (cac tu)) va hanh di va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (su sach)) ky nang xa hoi. bieu hien ((cac tuc) OR (cac tu)) va hanh di va triet".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (su sach)) ky nang xa hoi. bieu hien ((cac tuc) OR (cac tu)) va hanh di va triet*.