Perhaps you should try some spelling variations:
thuong thuyet » thuong thiet, thuong huyen, thuong thuat
trong thuat » trong hoat, trong thu, trong phat
trong trinh » trong tinh, trang trinh, trong thinh
trinh toan » tinh toan, thanh toan, trinh han
hien sang » hien trang, khien bang, chieu sang
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien sang - thanh ((thuong thuyet) or (trong thuat)) dung trong trinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien sang - thanh ((thuong thuyet) OR (trong thuat)) dung trong trinh toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc hien sang - thanh ((thuong thuyet) or (trong thuat)) dung trong trinh toan ban*.