Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
doanh khoa » toan khoa
thai muong » hai duong, thai cong, thai vung
thai dong » thai cong, thai long, ha dong
thanh van » thanh san, thanh toan, thanh phan
thu mach » thu sach, thuat mach, thu hoach
mach hoc » cach hoc, dich hoc, anh hoc
su doanh » so doanh, cua doanh, san doanh
khoa hoc » hoa hoc
cong su » cong suc, cong sua, cong cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu mach hoc tap, nghien thu cong su doanh khoa hoc cua ((thai dong) or (thai muong)) thanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu mach hoc tap, nghien thu cong su doanh khoa hoc cua ((thai dong) OR (thai muong)) thanh van.
• Adding a wildcard symbol may retrieve word variants: thu mach hoc tap, nghien thu cong su doanh khoa hoc cua ((thai dong) or (thai muong)) thanh van*.