Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
tinh lang » dinh lang, tinh sang, tinh bang
ha nhung » hoa nhung, hay nhung, pha nhung
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
toan ban » van ban
lang ha » long ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - tinh lang ha nhung ((cong dan) OR (cong tan)) ((toan tap) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - tinh lang ha nhung ((cong dan) OR (cong tan)) ((toan tap) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - tinh lang ha nhung ((cong dan) OR (cong tan)) ((toan tap) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - tinh lang ha nhung ((cong dan) OR (cong tan)) ((toan tap) or (toan ban))*.