Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien dai » hien dai
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
te cac » tu cac, ve cac, te cao
luc va » duc va, tuc va, loc va
dan le » ban le, van le, dan ve
le cua » ly cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te cac ky nang x ho. hieu vien dai ((luc va) or (thuc va)) dan le cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ky nang x ho. hieu vien dai ((luc va) OR (thuc va)) dan le cua tre.
• Adding a wildcard symbol may retrieve word variants: te cac ky nang x ho. hieu vien dai ((luc va) or (thuc va)) dan le cua tre*.