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