Perhaps you should try some spelling variations:
"te ban nam trinh do." » "te ban lap trinh do.", "te ban nam trong do.", "te ban nam trung do.", "te ban nam trinh ky.", "te van nam trinh do.", "te dan nam trinh do.", "te ban ham trinh do.", "te bao nam trinh do."
"thep mang lam tinh hoc." » "thep bang lam tinh hoc.", "tren mang lam tinh hoc.", "ghep tang lam tinh hoc.", "thep mang lai tinh hoc.", "thep mang mam tinh hoc.", "thep mang may tinh hoc.", "thep mang ha tinh hoc.", "thep mang ban tinh hoc.", "thep mang lam sinh hoc.", "thep mang lam tin hoc.", "thep mang lam hinh hoc."
"te ban nam dinh do." » "te van nam dinh do.", "te dan nam dinh do.", "te ban ham dinh do.", "te ban nam dinh dao.", "te ban nam dinh doc.", "te ban nam dinh so.", "te bao nam dinh do."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("thep mang lam tinh hoc.") or ((("te ban nam trinh do.") OR ("te ban nam dinh do."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("thep mang lam tinh hoc.") OR ((("te ban nam trinh do.") OR ("te ban nam dinh do."))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"thep mang lam tinh hoc.\") or (((\"te ban nam trinh do.\") OR (\"te ban nam dinh do.\"))))*".
• Removing quotes may allow a broader search: (( thep mang lam tinh hoc. ) or ((( te ban nam trinh do. ) OR ( te ban nam dinh do. ))))*.