Perhaps you should try some spelling variations:
thanh trung » thanh tung
hanh trung » hanh trang, manh trung, danh trung
hien xanh » hien hanh, hien nhanh, chieu xanh
dung cong » dung trong
vat dung » van dung, va dung, viet dung
cong dan » cong san, cong tan, huong dan
than cau » phan cau, than cap, thanh chau
toan cau » toan cao, toan ban, toan tap

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

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