Perhaps you should try some spelling variations:
tran thong » toan thong, tran hong, tran trong
thieu xanh » chieu xanh, thien anh, thien danh
hieu manh » chieu xanh, hieu nganh, dieu hanh
hoa lang » hoa dan, hoa van
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap
va lang » va nang

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)) - tran thong ((va lang) OR (hoa lang)) cong dan than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (hieu manh)) - tran thong ((va lang) OR (hoa lang)) cong dan than cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (hieu manh)) - tran thong ((va lang) OR (hoa lang)) cong dan than cau*.