Perhaps you should try some spelling variations:
phuong nghin » phuong ngon, truong nghien, huong nghiep
nghin quet » nghi que
quet lang » que lang, quan lang, biet lang
phong hoc » phong ho, thong hoc, phuong hoa
nhung thi » nhung thoi, phung thi, nhung tri
hieu quan » hieu qua, lieu quan, thien quan
boi duong » hai duong, doi tuong, con duong
thi hieu » thi chieu, thi hien, thi dieu
ngoai mo » ngoai ma, ngoai go, ngoai ho
hoc mo » hoc moi, hoc mot, hoc mon

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( phuong nghin quet lang. hai phong hoc mo ) or ( nhung thi hieu quan. boi duong ngoai mo ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( phuong nghin quet lang. hai phong hoc mo ) OR ( nhung thi hieu quan. boi duong ngoai mo )).
• Adding a wildcard symbol may retrieve word variants: (( phuong nghin quet lang. hai phong hoc mo ) or ( nhung thi hieu quan. boi duong ngoai mo ))*.