Perhaps you should try some spelling variations:
"cpphuong trinh hoc dan." » "phuong trinh hoc dan." (Expand Search), "chuong tinh hoc dan." (Expand Search), "phuong tinh hoc dan." (Expand Search), "cpphuong trinh hoi dan." (Expand Search), "cpphuong trinh mon dan." (Expand Search), "cpphuong sinh hoc dan." (Expand Search)
"vuong trinh do dan." » "cong trinh do dan." (Expand Search), "vuong trieu do dan." (Expand Search), "vuong trung do dan." (Expand Search), "vuong trinh mon dan." (Expand Search), "vuong trinh dao dan." (Expand Search), "vuong trinh do danh." (Expand Search), "vuong trinh co dan." (Expand Search)
"chuong trinh khac han." » "chuong trinh phat han." (Expand Search), "chuong trinh khac dan." (Expand Search), "chuong trinh khac hao." (Expand Search), "chuong trinh khach hang." (Expand Search), "huong trinh khac han." (Expand Search), "phuong trinh khac han." (Expand Search), "chung trinh khac han." (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: (("chuong trinh khac han.") OR ((("vuong trinh do dan.") OR ("cpphuong trinh hoc dan."))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"chuong trinh khac han.\") OR (((\"vuong trinh do dan.\") OR (\"cpphuong trinh hoc dan.\"))))".
• Removing quotes may allow a broader search: (( chuong trinh khac han. ) OR ((( vuong trinh do dan. ) OR ( cpphuong trinh hoc dan. )))).
• Adding a wildcard symbol may retrieve word variants: (("chuong trinh khac han.") OR ((("vuong trinh do dan.") OR ("cpphuong trinh hoc dan."))))*.