Perhaps you should try some spelling variations:
"te canh tranh buoc khoi đong luc" » "te canh tranh cuoc khoi đong luc", "te canh tranh duoc khoi đong luc", "te canh tran quoc khoi đong luc", "te canh tranh quoc hoi đong luc", "te canh tranh hoc khoi đong luc", "te canh tranh duoc hoi đong luc", "ve canh tranh buoc khoi đong luc", "te danh tranh buoc khoi đong luc", "re canh tranh buoc khoi đong luc"
"te sach tren duc khi đong luc" » "te sach tien duc khi đong luc", "te sach tranh duc khi đong luc", "te sach tran duc khi đong luc", "te sach ren duc khi đong luc", "toc sach tren duc khi đong luc", "te sach tren duc thi đong luc", "te sach tren duc kham đong luc", "te sach tren duc khoa đong luc"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("te canh tranh buoc khoi đong luc") or ("te sach tren duc khi đong luc"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("te canh tranh buoc khoi đong luc") OR ("te sach tren duc khi đong luc")).
• Removing quotes may allow a broader search: (( te canh tranh buoc khoi đong luc ) or ( te sach tren duc khi đong luc )).
• Adding a wildcard symbol may retrieve word variants: (("te canh tranh buoc khoi đong luc") or ("te sach tren duc khi đong luc"))*.