Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
danh nhan » doanh nhan, thanh nhan, benh nhan
cach thuc » anh thuc, cac thu
nhan dan » phan dau, gian dan, nhan tai
rai danh » dai danh, trai doanh, lai doanh
khoa hoc » hoa hoc
cong hoc » dong hoc, cong hoa, cong coc
cach hoc » cach thoi, dich hoc, cac hop
cac cong » cua cong
hoc lua » hoc luan, hoc luat, hoc cua
lua rai » lua lai, luat dai, luan rui

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo ((cach hoc) OR (cach thuc)) tap, nghien cac cong hoc nganh khoa hoc lua rai danh nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo ((cach hoc) OR (cach thuc)) tap, nghien cac cong hoc nganh khoa hoc lua rai danh nhan dan".
• Adding a wildcard symbol may retrieve word variants: bo ((cach hoc) OR (cach thuc)) tap, nghien cac cong hoc nganh khoa hoc lua rai danh nhan dan*.