Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
thanh van » thanh san, thanh toan, thanh phan
van thanh » ban thanh, van tuan
thong hoc » thuong hoc, tuong hoc, thong hoa
khung hoc » chung hoc, nhung hoc, thuong hoc
hoc nganh » hoc nhanh
sach hoi » sach doi, sach moi, cach thoi
mot hoc » mon hoc, mo hoc, mot goc
hai van » thai van, ha van, hai tan
hoi tap » hoi dap, hoc tap, hoi tai
tu sach » thu sach, su sach, te sach
ta hai » tai hai, tac hai, tra hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach hoi tap, nghien cua mot hoc nganh ((khung hoc) or (thong hoc)) ta hai van thanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoi tap, nghien cua mot hoc nganh ((khung hoc) OR (thong hoc)) ta hai van thanh van.
• Adding a wildcard symbol may retrieve word variants: tu sach hoi tap, nghien cua mot hoc nganh ((khung hoc) or (thong hoc)) ta hai van thanh van*.