Perhaps you should try some spelling variations:
hieu hien » dieu hien, chieu chien, dieu khien
hieu vien » hieu viec, thieu nien, hieu tieng
bieu hien » dieu hien, dieu khien, bien phien
cua triet » cua viet, su triet, va triet
lanh dai » lanh dao, lanh hai, lang dai
va lanh » va lang, va danh, va hanh
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
cac tu » cac thu, cach tu, cac du

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky nang x ho. ((hieu vien) or (((hieu hien) OR (bieu hien)))) cac tu va lanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky nang x ho. ((hieu vien) OR (((hieu hien) OR (bieu hien)))) cac tu va lanh dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky nang x ho. ((hieu vien) or (((hieu hien) OR (bieu hien)))) cac tu va lanh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: tu san ky nang x ho. ((hieu vien) or (((hieu hien) OR (bieu hien)))) cac tu va lanh dai cua triet*.