Perhaps you should try some spelling variations:
"co sach tranh cong thai đong luc" » "co sach thanh cong thai đong luc", "co sach trinh cong thai đong luc", "co sach tran cong thai đong luc", "co canh tranh cong thai đong luc", "co sach tranh cong hai đong luc", "co sach tranh hong thai đong luc", "co sach tranh cong thanh đong luc", "bo sach tranh cong thai đong luc", "cuon sach tranh cong thai đong luc", "hoc sach tranh cong thai đong luc"
"vu khach hang cho khi đong luc" » "vu khanh hang cho khi đong luc", "vu khac hang cho khi đong luc", "vay khach hang cho khi đong luc", "vu khach sang cho khi đong luc", "vu khach hang khoa khi đong luc", "vu khach phong cho khi đong luc", "vu khach hang co khi đong luc", "vu khach hang cho ghi đong luc", "vu khach hang cao khai đong luc"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("vu khach hang cho khi đong luc") OR ("co sach tranh cong thai đong luc"))~.
• Removing quotes may allow a broader search: (( vu khach hang cho khi đong luc ) or ( co sach tranh cong thai đong luc ))~.
• Adding a wildcard symbol may retrieve word variants: (("vu khach hang cho khi đong luc") or ("co sach tranh cong thai đong luc"))*.