Perhaps you should try some spelling variations:
quyen vang » quyen van, huyen van, duyen dang
nhung loi » nhung bai, nhung bi, nhung gi
loi quyet » toi quyet, bi quyet, loi que
nhung khi » nhung khai, nhung khia, nhung chi
khi quyen » thi huyen, thi xuyen, thi tuyen
hoc dung » hoc ung, hoc dan, tac dung
dung hoc » dong hoc, dung thuoc, trung hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( nhung loi quyet van. hoc dung hoc cao ) or ( nhung khi quyen vang. noi dung hoc cao ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( nhung loi quyet van. hoc dung hoc cao ) OR ( nhung khi quyen vang. noi dung hoc cao )).
• Adding a wildcard symbol may retrieve word variants: (( nhung loi quyet van. hoc dung hoc cao ) or ( nhung khi quyen vang. noi dung hoc cao ))*.