Perhaps you should try some spelling variations:
thuoc nganh » thuong nganh, hoc nganh, chuc nganh
cong thuoc » cong thuc, dong thuoc, long thuoc
nganh hoa » thanh hoa, khanh hoa, danh hoa
phan phan » phap phan, phan phat, than phan
sach hoc » sach hoi, mach hoc, sach duoc
cach hoc » cach thuc, cach thoi, dich hoc
cuu cong » cua cong, thu cong, cac cong
hoa phan » hoa dan, co phan
phan van » pham van, thanh van, luan 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 hoc) OR (cach hoc)) tap, nghien cuu cong thuoc nganh hoa hoc ma hoa phan phan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach hoc) OR (cach hoc)) tap, nghien cuu cong thuoc nganh hoa hoc ma hoa phan phan van".
• Adding a wildcard symbol may retrieve word variants: tu ((sach hoc) OR (cach hoc)) tap, nghien cuu cong thuoc nganh hoa hoc ma hoa phan phan van*.