Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
lang cong » dang cong, bang cong, lang dong
hang cong » dang cong, hang nong, bang cong
trung va » truong va, trang va, trung ha
san than » sang than, san thanh, ban than
than cau » toan cau, phan cau, than cap

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 hanh)) - thanh trung va ((lang cong) OR (hang cong)) san than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien hanh)) - thanh trung va ((lang cong) OR (hang cong)) san than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (hien hanh)) - thanh trung va ((lang cong) OR (hang cong)) san than cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien hanh)) - thanh trung va ((lang cong) OR (hang cong)) san than cau*.