Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, chieu xanh, hien khanh
tinh lang » dinh lang, tinh sang, tinh bang
cong dan » cong san, cong tan, huong dan
toan ban » van ban
lang va » lang van, hang va, lang 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) OR (hien nhanh)) - tinh lang va nhung cong dan ((toan tap) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien nhanh)) - tinh lang va nhung cong dan ((toan tap) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (hien nhanh)) - tinh lang va nhung cong dan ((toan tap) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (hien nhanh)) - tinh lang va nhung cong dan ((toan tap) or (toan ban))*.