Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
nghien cua » nghien cuu, nghiep cua, nghiep vua
van thanh » ban thanh, van tuan
thu sach » tu sach, thuat sach, thuoc sach
sach hoc » cach hoc, sach hoi, mach hoc
danh hoa » thanh hoa, khanh hoa, nganh hoa
thanh va » thanh van, hanh va, thanh ha
hai van » thai van, ha van, hai tan
ma hai » ta hai, va hai, xa hai

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

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