Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
doanh khoa » toan khoa
coc doanh » cac doanh, hoa doanh, cho doanh
ban thanh » ban hanh, ban hang
thanh van » thanh san, thanh toan, thanh phan
hanh noi » ha noi, hanh vi, nang noi
cong coc » cong cuoc, cong cac, cong co
khoa hoc » hoa hoc
vu hanh » vu khanh, vu thanh, du hanh
noi tap » toi tap, ngoai tap, noi tiep
mai hoi » mai khoi, dai hoi, lai hoi
ma hoi » xa hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu hanh noi tap, nghien cua cong coc doanh khoa hoc ((ma hoi) or (mai hoi)) ban thanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu hanh noi tap, nghien cua cong coc doanh khoa hoc ((ma hoi) OR (mai hoi)) ban thanh van.
• Adding a wildcard symbol may retrieve word variants: vu hanh noi tap, nghien cua cong coc doanh khoa hoc ((ma hoi) or (mai hoi)) ban thanh van*.