Perhaps you should try some spelling variations:
luan dang » luan nang, luan danh, luan dong
dang cong » dung cong
khi xanh » khia canh, thi hanh, thi anh
anh dung » anh dong, anh huong, sach dung
cong tan » cong tac, cong san, cong thanh
toan cao » toan ban
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi khi xanh - anh dung luan dang cong tan ((toan cao) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi khi xanh - anh dung luan dang cong tan ((toan cao) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: doi khi xanh - anh dung luan dang cong tan ((toan cao) OR (toan tap))*.