Perhaps you should try some spelling variations:
"chung trinh mon hoc." » "chuong trinh mon hoc." (Expand Search), "chung tinh mon hoc." (Expand Search), "chuuong trinh mon hoc." (Expand Search)
"khung trinh mon hoc." » "chuong trinh mon hoc." (Expand Search), "hung tinh mon hoc." (Expand Search), "nhung tinh mon hoc." (Expand Search)
"khuong tinh mon hoc." » "chuong trinh mon hoc." (Expand Search), "duong tinh mon hoc." (Expand Search), "phong tinh mon hoc." (Expand Search), "khuong tinh muon hoc." (Expand Search), "khuong tinh kon hoc." (Expand Search), "khuong tinh con hoc." (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: (("chung trinh mon hoc.") OR ((("khung trinh mon hoc.") OR ("khuong tinh mon hoc."))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"chung trinh mon hoc.\") OR (((\"khung trinh mon hoc.\") OR (\"khuong tinh mon hoc.\"))))".
• Removing quotes may allow a broader search: (( chung trinh mon hoc. ) OR ((( khung trinh mon hoc. ) OR ( khuong tinh mon hoc. )))).
• Adding a wildcard symbol may retrieve word variants: (("chung trinh mon hoc.") OR ((("khung trinh mon hoc.") OR ("khuong tinh mon hoc."))))*.