Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh tang » hanh trang, anh tang, hanh mang
chi xanh » chi anh, chi danh, chieu xanh
chi hanh » chi nhanh, chi thanh, thi hanh
cong tan » cong tac, cong san, cong thanh
toan tap » toan ban
tang va » trang va, tang van, thang va

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) OR (chi hanh)) - hanh tang va nhung cong tan ((toan tap) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chi xanh) OR (chi hanh)) - hanh tang va nhung cong tan ((toan tap) OR (van ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chi xanh) OR (chi hanh)) - hanh tang va nhung cong tan ((toan tap) or (van ban))".
• Adding a wildcard symbol may retrieve word variants: doi ((chi xanh) OR (chi hanh)) - hanh tang va nhung cong tan ((toan tap) or (van ban))*.