Perhaps you should try some spelling variations:
quang dung » quang trung, ung dung, cuong dung
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
dung cong » dung trong
cong vang » cong lang, cong quang, cong ngang
vang toan » van toan, dang toan, quang toan
toan cau » toan cao, toan ban, toan tap

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)) - ((canh tranh) or (hanh tinh)) quang dung cong vang toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien hanh)) - ((canh tranh) OR (hanh tinh)) quang dung cong vang toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (hien hanh)) - ((canh tranh) or (hanh tinh)) quang dung cong vang toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (hien hanh)) - ((canh tranh) or (hanh tinh)) quang dung cong vang toan cau*.