Perhaps you should try some spelling variations:
thoi quyet » toi quyet, theo quyet, thoi quen
nhung tri » nhung bai, dung tri, nhung bi
quen vang » que lang, quen hanh, quet lang
quan van » luan van, quan va, quan luan
truc may » tren may
que van » qua van, quy van, quyet van
truc va » thuc va, thuc vat, trung va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: nhung tri ((((quen vang) OR (quan van))) OR (que van)). thoi quyet ((truc va) OR (truc may))~.
• Adding a wildcard symbol may retrieve word variants: nhung tri ((((quen vang) or (quan van))) or (que van)). thoi quyet ((truc va) or (truc may))*.