Perhaps you should try some spelling variations:
thuoc nganh » thuong nganh, hoc nganh, chuc nganh
dong thuoc » dung thuoc, dang thuoc, don thuoc
cach thoi » cac thoi, cach thuc, cach noi
nganh hoa » thanh hoa, khanh hoa, danh hoa
phan phat » phap phat, van phat, phan phoi
sach hoi » sach doi, sach moi, hoach hoi
cuu dong » cuu cong, cuu tong, cuu long
hoa phan » hoa dan, co phan
phat van » pham van, phan van, phap 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 hoi) or (cach thoi)) tap, nghien cuu dong thuoc nganh hoa hoc ma hoa phan phat van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach hoi) OR (cach thoi)) tap, nghien cuu dong thuoc nganh hoa hoc ma hoa phan phat van.
• Adding a wildcard symbol may retrieve word variants: tu ((sach hoi) or (cach thoi)) tap, nghien cuu dong thuoc nganh hoa hoc ma hoa phan phat van*.