Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
hanh hang » thanh hang, hang hang, hanh han
dung cong » dung trong
khao cuu » cham cuu, chao chu, kho cua
hang van » hoang van, hang va, dang van
van dung » van dong, xay dung, tin dung
tra cuu » tra cau, trau cua, trua cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: khao cuu tinh - hanh hang van dung cong thanh ((tra sau) or (tra cuu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: khao cuu tinh - hanh hang van dung cong thanh ((tra sau) OR (tra cuu)).
• Adding a wildcard symbol may retrieve word variants: khao cuu tinh - hanh hang van dung cong thanh ((tra sau) or (tra cuu))*.