Perhaps you should try some spelling variations:
thanh trung » thanh tung
dang trong » dung trong, dong trong, lang trong
hoc thieu » toc thieu
trung cua » truong cua, trung tuan, trung cap
trong tac » trong cac, tuong tac, trong tan
cua dang » cua cong, cua ban
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 dang trong tac toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) OR (hoc hien)) xanh - thanh trung cua dang trong tac toan cao".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) OR (hoc hien)) xanh - thanh trung cua dang trong tac toan cao*.