Perhaps you should try some spelling variations:
thanh trong » thanh trung, hanh trong, nhanh trong
tranh trong » tran trong, trinh trong, anh trong
tieu xanh » tieu danh, chieu xanh, dieu hanh
trong tac » trong cac, tuong tac, trong tan
tac vang » cac van, tac dung, tac dong
vang ban » van ban, hang ban, nang ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu xanh - ((thanh trong) or (tranh trong)) su dung trong tac vang ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - ((thanh trong) OR (tranh trong)) su dung trong tac vang ban.
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - ((thanh trong) or (tranh trong)) su dung trong tac vang ban*.