Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
khong thuoc » khang thuoc, hong phuoc, dong thuoc
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
hoc nganh » hoc nhanh
van thanh » ban thanh, van tuan
thanh van » thanh san, thanh toan, thanh phan
cong hoc » dong hoc, cong hoa, cong coc
thuoc xa » thuoc ma, thuoc va, thuoc la
tu sach » thu sach, su sach, te sach
hoi van » hoi va, hoi dan, hai van

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) or (thu hoach)) hoc tap, nghien thu cong hoc nganh khong thuoc xa hoi van thanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu hoach)) hoc tap, nghien thu cong hoc nganh khong thuoc xa hoi van thanh van.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu hoach)) hoc tap, nghien thu cong hoc nganh khong thuoc xa hoi van thanh van*.