Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
canh doanh » hanh doanh, chinh doanh, doanh doanh
doanh cua » doanh luan
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
san cau » van cau, can cau, ran cau
ban cau » bang cau, ban can, van cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu tinh - canh doanh cua dung cong trinh ((san cau) or (ban cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu tinh - canh doanh cua dung cong trinh ((san cau) OR (ban cau)).
• Adding a wildcard symbol may retrieve word variants: toc thieu tinh - canh doanh cua dung cong trinh ((san cau) or (ban cau))*.