Perhaps you should try some spelling variations:
hiem nghe » hiem ngheo, nhiem nghe, hiem ngan
nghe nam » nghe lam, nghiep nam, nghe nano
cao hoa » cao hoat, cao khoa, cau hoa
cua tre » cuu tre, cua triet, dua tren
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
thu ca » thu cua, thu ha, thu ba
ca dan » cac dan, ca dao
dan vi » doan vi, don vi, dan va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky nang cao hoa. hiem nghe nam thu ca dan vi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky nang cao hoa. hiem nghe nam thu ca dan vi ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: tu sai ky nang cao hoa. hiem nghe nam thu ca dan vi ((cua tre) or (cua te))*.