Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
trinh cua » tinh cua, trinh quan, trinh luan
lang toan » lang thang, lang thanh, quang toan
dang toan » dang tran, dan toan, dung toan
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu xanh - hanh ((trinh cua) or (trinh luat)) nhung cong ((lang toan) OR (dang toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu xanh - hanh ((trinh cua) OR (trinh luat)) nhung cong ((lang toan) OR (dang toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu xanh - hanh ((trinh cua) or (trinh luat)) nhung cong ((lang toan) OR (dang toan)) cau".
• Adding a wildcard symbol may retrieve word variants: theo chu xanh - hanh ((trinh cua) or (trinh luat)) nhung cong ((lang toan) OR (dang toan)) cau*.