Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
doi chieu » doc hieu, doi chi, mot chieu
canh manh » lanh manh, canh tranh, cach mang
cua thong » cua thuong, cua tong, suat thong
cua khong » hua khong, cua phuong, cua thuong
ho chieu » theo chieu, hoc thieu, mot chieu
pho cau » pho cap, pha cau, pho cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (ho chieu)) sach - canh manh ((cua thong) OR (cua khong)) cong thanh pho cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (ho chieu)) sach - canh manh ((cua thong) OR (cua khong)) cong thanh pho cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (ho chieu)) sach - canh manh ((cua thong) OR (cua khong)) cong thanh pho cau".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (ho chieu)) sach - canh manh ((cua thong) OR (cua khong)) cong thanh pho cau*.