Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hieu viec » nhieu viec, hieu ve, sieu viet
cua triet » cua viet, su triet
lanh dai » lanh dao, lanh hai, lang dai
va triet » va thiet, va trien, ve triet
cac tuc » cac toc, cac tu, cac tac
va lanh » va lang, va danh, va hanh
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
tuc va » thuc va, truc va, tuc xa

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