Perhaps you should try some spelling variations:
thanh trung » thanh tung
hoac khong » hoa khong, hoc khong, hay khong
khong dung » thong dung, phuong dung, cuong dung
hanh tang » hanh trang, anh tang, hanh mang
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang
dung tac » dung tai, dung cac, dung tay
tac toan » tap toan, tam toan, hach toan
toan cau » 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: theo chu xanh - ((hanh tang) or (thanh trung)) hoac khong dung tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu xanh - ((hanh tang) OR (thanh trung)) hoac khong dung tac toan cau.
• Adding a wildcard symbol may retrieve word variants: theo chu xanh - ((hanh tang) or (thanh trung)) hoac khong dung tac toan cau*.