Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hien xanh » hien hanh, hien nhanh, chieu xanh
cua trong » cua truong, qua trong, ca trong
cua trung » cua truong, xuan trung, cua nhung
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van 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 - hanh tranh ((cua trong) OR (cua trung)) cong tan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - hanh tranh ((cua trong) OR (cua trung)) cong tan toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh tranh ((cua trong) OR (cua trung)) cong tan toan cau*.