Perhaps you should try some spelling variations:
dong cong » duong cong, dung cong, dang cong
dan khoan » dan khoa, dai khoang, toan khoan
khoan cam » khoa cam, khoan va, phan cam
tang cua » hang cua, tang luan, thong cua
mang cua » manh cua, dung cua, ban cua
cong dan » cong san, cong tan, huong dan
trieu » thieu, trien, tieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: dong trieu tinh - hanh ((tang cua) OR (mang cua)) dong cong dan khoan cam~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong trieu tinh - hanh ((tang cua) OR (mang cua)) dong cong dan khoan cam".
• Adding a wildcard symbol may retrieve word variants: dong trieu tinh - hanh ((tang cua) OR (mang cua)) dong cong dan khoan cam*.