Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
thieu xanh » chieu xanh, thien anh, thien danh
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh hinh » hanh chinh, hanh tinh, hanh dinh
cong dan » cong san, cong tan, huong dan
gian man » gian lan, gian van, gian ban
gian dan » gian lang
hinh va » chinh va, hanh va, tinh va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) OR (hieu manh)) - hanh hinh va nhung cong dan ((gian man) or (gian dan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - hanh hinh va nhung cong dan ((gian man) OR (gian dan)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (hieu manh)) - hanh hinh va nhung cong dan ((gian man) or (gian dan))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (hieu manh)) - hanh hinh va nhung cong dan ((gian man) or (gian dan))*.