Perhaps you should try some spelling variations:
trong chuan » thong chuan, trong chan, trong thuan
hoc thiet » hoc thieu, hoc thuyet, hoc hien
thiet anh » thien anh, thuyet anh, thien danh
trong can » trong canh, trong chan, trong cac
dung cong » dung trong
cong thuc » cong tac
thuc toan » thuc trang, thuat toan, thuc thanh
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thiet anh - thanh ((trong chuan) or (trong can)) dung cong thuc toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet anh - thanh ((trong chuan) OR (trong can)) dung cong thuc toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thiet anh - thanh ((trong chuan) or (trong can)) dung cong thuc toan cao*.