Perhaps you should try some spelling variations:
nhung thoi » nhung thi, phung thi, nhung loi
quen vang » que van, que lang, quet lang
quen hanh » quen thanh, quan hanh, quang hanh
thuoc mot » huoc mot, thuoc moi, thuoc ma
quan van » quan va, quan luan, quan doan
noi dung » hoc dung
luan » lan

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 ((((quen vang) OR (quen hanh))) or (((quan van) or (luan van)))). noi dung thuoc mot~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nhung thoi ((((quen vang) OR (quen hanh))) OR (((quan van) OR (luan van)))). noi dung thuoc mot*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nhung thoi ((((quen vang) OR (quen hanh))) or (((quan van) or (luan van)))). noi dung thuoc mot*".