Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
thieu tinh » trieu tinh, chieu tinh, thien tinh
canh doanh » hanh doanh, chinh doanh, kinh doanh
luan dung » lan dung, luan dong, luan hung
dung cong » dung trong
trinh san » trinh quan, trinh toan, trinh luan
trinh han » trinh quan

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) OR (doanh doanh)) luan dung cong ((trinh san) or (trinh han)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu tinh - ((canh doanh) OR (doanh doanh)) luan dung cong ((trinh san) OR (trinh han)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thieu tinh - ((canh doanh) OR (doanh doanh)) luan dung cong ((trinh san) or (trinh han)) cau".
• Adding a wildcard symbol may retrieve word variants: toc thieu tinh - ((canh doanh) OR (doanh doanh)) luan dung cong ((trinh san) or (trinh han)) cau*.