Perhaps you should try some spelling variations:
cang thang » cong thanh, dang thanh
doi chieu » doc hieu, ho chieu, mot chieu
hanh hang » thanh hang, hang hang, hanh han
cong tinh » cong trinh, cong vinh, long tinh
va trong » va truong, va thong, va tuong
toan ban » van ban
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 chieu) OR (doi chi)) xanh - ((hanh hang) or (cang thang)) va trong cong tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doi chi)) xanh - ((hanh hang) OR (cang thang)) va trong cong tinh toan ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (doi chi)) xanh - ((hanh hang) or (cang thang)) va trong cong tinh toan ban*".