Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
doanh khoa » toan khoa
hoach hoc » hoach hoi, hoach hoa, hoa hoc
thai dong » thai cong, thai muong, ha dong
thai long » hai long, thai cong, thang long
thanh van » thanh san, thanh toan, thanh phan
so doanh » so danh, su doanh, hoa doanh
khoa hoc » hoa hoc
cong so » cong san, cong hoa
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu hoach hoc tap, nghien thu cong so doanh khoa hoc xa ((thai dong) OR (thai long)) thanh van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu hoach hoc tap, nghien thu cong so doanh khoa hoc xa ((thai dong) OR (thai long)) thanh van".
• Adding a wildcard symbol may retrieve word variants: thu hoach hoc tap, nghien thu cong so doanh khoa hoc xa ((thai dong) OR (thai long)) thanh van*.