Perhaps you should try some spelling variations:
khong thuoc » khang thuoc, hong phuoc, dong thuoc
nganh khong » nganh cong, nhanh chong, nganh nong
hoc nganh » hoc nhanh
thuoc mai » thuoc ma, thuoc tai, thuoc moi
sach hoi » sach doi, sach moi, cach thoi
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
phan van » thanh van, luan van, tran van
tu sach » thu sach, su sach, te sach
hoi tap » hoi dap, hoc tap, hoi tai
mai hoi » mai khoi, dai hoi, lai hoi

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