Perhaps you should try some spelling variations:
nguoi cong » nguoi muong, nguoi thong, nguoi nung
nhung thi » nhung thoi, phung thi, nhung tri
quen vang » quan van, que lang, quen hanh
nhung gi » nhung bi, nhung bai
que van » qua van, quy van, quyet van
hoc mot » hoc moi
hoc mo » hoc moi, hoc mon, hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((nhung thi) or (nhung gi)) ((quen vang) or (que van)). nguoi cong ((hoc mo) OR (hoc mot))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((nhung thi) OR (nhung gi)) ((quen vang) OR (que van)). nguoi cong ((hoc mo) OR (hoc mot)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((nhung thi) or (nhung gi)) ((quen vang) or (que van)). nguoi cong ((hoc mo) OR (hoc mot))".
• Adding a wildcard symbol may retrieve word variants: ((nhung thi) or (nhung gi)) ((quen vang) or (que van)). nguoi cong ((hoc mo) OR (hoc mot))*.