Perhaps you should try some spelling variations:
nhung thoi » nhung thi, nhung loi, nhung tri
thoi ruan » thoi rua, thoi gian, thoi quen
boi duong » hai duong, doi tuong, con duong
duong uoc » huong uoc, duong hoc, duong nguoc
ruan van » luan van, quan van, chuan van
hoc dung » hoc ung, hoc dan, tac dung
dung uoc » dung quoc, dung hoc, dung coc
ca va » co va, c va, ca ve
cu va » cuu va, tu va, su va

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( nhung thoi ruan van. boi duong uoc mo ) or ( phung thi ((ca va) OR (cu va)). hoc dung uoc mo ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( nhung thoi ruan van. boi duong uoc mo ) OR ( phung thi ((ca va) OR (cu va)). hoc dung uoc mo ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( nhung thoi ruan van. boi duong uoc mo ) or ( phung thi ((ca va) OR (cu va)). hoc dung uoc mo ))*".