Perhaps you should try some spelling variations:
doanh tuong » doanh thuong, doanh tong, doanh trong
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
hoa doanh » toan doanh, hoa dan
tuong hoc » truong hoc, tuong ho, duong hoc
bach doi » sach doi, gach duoi, bach mai
cong hoa » dong hoa, dong hoc, hang hoa
khoi bay » khi bai
toan tap » toan ban
doi tai » hoi tai, dai tai, doi tac
hoi bai » hoc bai, hoi tai
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: vu bach doi tai, nghien thu cong hoa doanh tuong hoc xa ((hoi bai) OR (khoi bay)) toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu bach doi tai, nghien thu cong hoa doanh tuong hoc xa ((hoi bai) OR (khoi bay)) toan tap".
• Adding a wildcard symbol may retrieve word variants: vu bach doi tai, nghien thu cong hoa doanh tuong hoc xa ((hoi bai) OR (khoi bay)) toan tap*.