Perhaps you should try some spelling variations:
thanh trung » thanh tung
cong trong » cong thuong, duong trong, cong trinh
hoc thieu » toc thieu
trung cua » truong cua, trung tuan, trung cap
trong tac » trong cac, tuong tac, trong tan
tac toan » tap toan, tam toan, hach toan
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 thieu) or (hoc hien)) xanh - thanh trung cua cong trong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (hoc hien)) xanh - thanh trung cua cong trong tac toan cao.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (hoc hien)) xanh - thanh trung cua cong trong tac toan cao*.