Perhaps you should try some spelling variations:
khach hoi » khanh hoa, hoach hoi, sach hoi
danh nhan » doanh nhan, thanh nhan, benh nhan
vu khach » vu khanh, vu khac, vay khach
cuu dong » cuu cong, cuu tong, cuu long
dong luc » nang luc
luc phan » duc phan, luc nhan, luan phan
phan hoa » phan loai, phan phoi, phan hong
hoi tap » hoi dap, hoc tap, 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 khach hoi tap, nghien cuu dong luc phan hoa hoc xa hoi ((danh nhan) or (ca nhan)) dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach hoi tap, nghien cuu dong luc phan hoa hoc xa hoi ((danh nhan) OR (ca nhan)) dan.
• Adding a wildcard symbol may retrieve word variants: vu khach hoi tap, nghien cuu dong luc phan hoa hoc xa hoi ((danh nhan) or (ca nhan)) dan*.