Perhaps you should try some spelling variations:
thieu nien » thien nhien
hieu vien » hieu hien, hieu viec, hieu tieng
nang dac » nang doc, nang dau, nang dan
dac khoa » da khoa, dai khoa, dau khoa
danh day » danh dau, dan day, doanh dao
cac luc » cau luc, coc luc, cac nuoc
va danh » va dinh, va dan, va hanh
day cua » dai cua
cua tre » cua te, cuu tre, cua triet
so dac » so dan
dac ky » cac ky, dan ky, sac ky
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: so dac ky nang dac khoa. ((hieu vien) or (thieu nien)) cac luc va danh day cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so dac ky nang dac khoa. ((hieu vien) OR (thieu nien)) cac luc va danh day cua tre.
• Adding a wildcard symbol may retrieve word variants: so dac ky nang dac khoa. ((hieu vien) or (thieu nien)) cac luc va danh day cua tre*.