Perhaps you should try some spelling variations:
quyen vang » quyen van, quyet van, huyen van
quen vang » quan van, que van, que lang
nuoi dung » nguoi dung, nuoi duong, noi dung
muong hoi » duong hoi, muong hoa, truong hoi
bai quen » bai luyen, dai quyen, hai quan
dung hoc » dong hoc, dung thuoc, trung hoc
nhung si » nhung bi, nhung gi, nhung su
si quyen » khi quyen, gia quyen, dai quyen
hoc mon » hoc moi, hoc mot, hoc cong
hoi mot » hoc mot, hoa mot, hop mot

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( nhung bai quen vang. nuoi dung hoc mon ) or ( nhung si quyen vang. nguoi muong hoi mot ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( nhung bai quen vang. nuoi dung hoc mon ) OR ( nhung si quyen vang. nguoi muong hoi mot )).
• Adding a wildcard symbol may retrieve word variants: (( nhung bai quen vang. nuoi dung hoc mon ) or ( nhung si quyen vang. nguoi muong hoi mot ))*.