Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hieu vien » hieu viec, thieu nien, hieu tieng
cua triet » cua viet, su triet, va triet
lang dai » lang hai, lang mai, lang chai
cac tuc » cac toc, cac tu, cac tac
va lang » va nang, hoa lang
tu can » tu ban, tu cac, thu canh
can ky » van ky, dan ky, ban 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 can ky nang x ho. ((hieu vien) or (hieu hien)) cac tuc va lang dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu can ky nang x ho. ((hieu vien) OR (hieu hien)) cac tuc va lang dai cua triet.
• Adding a wildcard symbol may retrieve word variants: tu can ky nang x ho. ((hieu vien) or (hieu hien)) cac tuc va lang dai cua triet*.