Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien xanh » hien hanh, hien nhanh, chieu xanh
trung vat » trung va, trung van, trong vat
dung cong » dung trong
doan phan » doanh phan, toan phan, dan phan
vat dung » van dung, va dung, viet dung
dam phan » d phan, va phan, van phan

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 xanh - thanh trung vat dung cong ((dam phan) or (doan phan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - thanh trung vat dung cong ((dam phan) OR (doan phan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - thanh trung vat dung cong ((dam phan) or (doan phan)) cau*.