Perhaps you should try some spelling variations:
vang thanh » van thanh, dang thanh, nang thanh
canh doanh » hanh doanh, chinh doanh, doanh doanh
tang thanh » dang thanh, trung thanh, hoang thanh
chi xanh » chi anh, chi danh, chi hanh
cua dung » cua dang, cua dong, cua rung
qua dung » quang dung, su dung, qua song
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi xanh - canh doanh ((cua dung) or (qua dung)) cong ((vang thanh) OR (tang thanh)) tay~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - canh doanh ((cua dung) OR (qua dung)) cong ((vang thanh) OR (tang thanh)) tay.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi xanh - canh doanh ((cua dung) or (qua dung)) cong ((vang thanh) OR (tang thanh)) tay".
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - canh doanh ((cua dung) or (qua dung)) cong ((vang thanh) OR (tang thanh)) tay*.