Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
cuoc nganh » hoc nganh, cac nganh, chuc nganh
cong cuoc » song cuoc, trong cuoc, luong cuoc
sach hoc » cach hoc, sach hoi, mach hoc
nong hoc » dong hoc, nong thon, duong hoc
nang hoc » nang doc, nang luc, dong hoc
phan van » pham van, thanh van, luan van
tu sach » thu sach, su sach, te sach
ca phan » cac phan, cao phan, cap phan
hoi ca » hoi cua, hoi cac, hoi cau

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 hoc tap, nghien thu cong cuoc nganh ((nong hoc) OR (nang hoc)) xa hoi ca phan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hoc tap, nghien thu cong cuoc nganh ((nong hoc) OR (nang hoc)) xa hoi ca phan van".
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien thu cong cuoc nganh ((nong hoc) OR (nang hoc)) xa hoi ca phan van*.