Perhaps you should try some spelling variations:
nhung thoi » phung thi, nhung loi, nhung tri
nhung thi » phung thi, nhung tri, nhung chi
quen vang » que van, que lang, quen hanh
thoi quan » thoi quen, thi quan, thong quan
quan van » luan van, quan va, quan luan
quan cua » quan luan, ban cua, gian cua
cua lap » chua lap, cua tap, cua lam

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) OR (nhung thi)) ((quen vang) or (quan van)). thoi quan cua lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((nhung thoi) OR (nhung thi)) ((quen vang) OR (quan van)). thoi quan cua lap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((nhung thoi) OR (nhung thi)) ((quen vang) or (quan van)). thoi quan cua lap".
• Adding a wildcard symbol may retrieve word variants: ((nhung thoi) OR (nhung thi)) ((quen vang) or (quan van)). thoi quan cua lap*.