Perhaps you should try some spelling variations:
thieu nien » thien nhien
hieu hien » bieu hien, dieu hien, chieu chien
hanh dai » hanh tai, hanh dao, vanh dai
va trien » va truyen, va thiet, va tuyen
cac tuc » cac toc, cac tu, cac tac
va hanh » van hanh, va thanh, va danh
tu can » tu ban, tu cac, thu canh
can ky » van ky, dan ky, ban ky
tuc va » thuc va, truc va, tuc xa
dai va » mai va

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. ((thieu nien) or (hieu hien)) cac tuc va hanh dai va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu can ky nang x ho. ((thieu nien) OR (hieu hien)) cac tuc va hanh dai va trien.
• Adding a wildcard symbol may retrieve word variants: tu can ky nang x ho. ((thieu nien) or (hieu hien)) cac tuc va hanh dai va trien*.