Perhaps you should try some spelling variations:
cach thuoc » cach thuc, cay thuoc, cach thoi
nghien cua » nghien cuu, nghiep cua, nghiep vua
nganh khoa » nganh hoa, nganh khong, doanh khoa
thuoc tai » nuoc tai, hoc tai, thuoc ma
hoc nganh » hoc nhanh
khoa hoc » hoa hoc
tu cach » tu cac
mot hoc » mon hoc, mo hoc, mot goc
hoc dai » hoc dan
dai roi » dai hoi, dai moi, di roi
va phan » van phan, va phap, hoa phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cach thuoc tai, nghien cua mot hoc nganh khoa hoc dai roi ((va phan) OR (va phat)) van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cach thuoc tai, nghien cua mot hoc nganh khoa hoc dai roi ((va phan) OR (va phat)) van".
• Adding a wildcard symbol may retrieve word variants: tu cach thuoc tai, nghien cua mot hoc nganh khoa hoc dai roi ((va phan) OR (va phat)) van*.