Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
cong thanh » dong thanh, cong trinh, cong tan
canh tran » canh tranh, hanh trang, banh trang
van nhung » van nhuong, va nhung, van hung
chi xanh » chi anh, chi danh, chi hanh
tran van » luan van
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 chi xanh - canh tran van nhung cong thanh ((pho da) OR (pho ha))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi xanh - canh tran van nhung cong thanh ((pho da) OR (pho ha))".
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - canh tran van nhung cong thanh ((pho da) OR (pho ha))*.