Perhaps you should try some spelling variations:
nong thuoc » dong thuoc, khong thuoc, luong thuoc
long thuoc » luong thuoc, dong thuoc, khong thuoc
hoc nganh » hoc nhanh
sach hoc » cach hoc, sach hoi, mach hoc
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
phan van » pham van, thanh van, luan van
su sach » so sach, vu sach
va phan » van phan, va phat, va phap

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach hoc tap, nghien cuu cong hoc nganh ((nong thuoc) OR (long thuoc)) xa hoi va phan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach hoc tap, nghien cuu cong hoc nganh ((nong thuoc) OR (long thuoc)) xa hoi va phan van".
• Adding a wildcard symbol may retrieve word variants: su sach hoc tap, nghien cuu cong hoc nganh ((nong thuoc) OR (long thuoc)) xa hoi va phan van*.