Perhaps you should try some spelling variations:
"cpphuong trinh do dan." » "phuong trinh do dan." (Expand Search), "chuong tinh do dan." (Expand Search), "phuong tinh do dan." (Expand Search), "cpphuong trinh mon dan." (Expand Search), "cpphuong trinh dao dan." (Expand Search), "cpphuong trinh do danh." (Expand Search), "cpphuong trinh co dan." (Expand Search)
"cong trinh hoi phat." » "cong trinh mon phat." (Expand Search), "cong trinh voi phat." (Expand Search), "cong trinh hoa phat." (Expand Search), "cong trinh hoc phat." (Expand Search)
"chuong trinh luat than." » "chuong trinh luat thanh." (Expand Search), "chuong trinh lua than." (Expand Search), "chuong trinh luat chan." (Expand Search)

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: (("cong trinh hoi phat.") OR ((("chuong trinh luat than.") OR ("cpphuong trinh do dan."))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"cong trinh hoi phat.\") OR (((\"chuong trinh luat than.\") OR (\"cpphuong trinh do dan.\"))))".
• Removing quotes may allow a broader search: (( cong trinh hoi phat. ) OR ((( chuong trinh luat than. ) OR ( cpphuong trinh do dan. )))).
• Adding a wildcard symbol may retrieve word variants: (("cong trinh hoi phat.") OR ((("chuong trinh luat than.") OR ("cpphuong trinh do dan."))))*.