Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
sinh duong » dinh duong, sinh dung, trinh duong
binh duong » dinh duong
sach hoc » cach hoc, sach hoi, mach hoc
thu dong » thuy dong, tu dong, thu cong
dong hoc » dong co, dong luc
cao nhan » ca nhan, tao nhan, cam nhan
nhan tai » hang tai, van tai, toan tai
te sach » toc sach
bai hoc » dai hoc
co bai » cao bai, cho bai, co ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach hoc tap, nghien thu dong hoc ((sinh duong) OR (binh duong)) co bai hoc cao nhan tai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach hoc tap, nghien thu dong hoc ((sinh duong) OR (binh duong)) co bai hoc cao nhan tai".
• Adding a wildcard symbol may retrieve word variants: te sach hoc tap, nghien thu dong hoc ((sinh duong) OR (binh duong)) co bai hoc cao nhan tai*.