Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
trong mach » trong cac, trong minh, trong anh
mach toan » manh toan, hach toan, mach tuan
nhu hieu » nhu hien, nho hieu, nhu dieu
nha hieu » nha dieu, nghe hieu, phan hieu
cua dung » cua dang, cua dong, qua dung
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: ((nhu hieu) or (nha hieu)) lang - ((hanh trinh) OR (canh tranh)) cua dung trong mach toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((nhu hieu) OR (nha hieu)) lang - ((hanh trinh) OR (canh tranh)) cua dung trong mach toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((nhu hieu) or (nha hieu)) lang - ((hanh trinh) OR (canh tranh)) cua dung trong mach toan cau".
• Adding a wildcard symbol may retrieve word variants: ((nhu hieu) or (nha hieu)) lang - ((hanh trinh) OR (canh tranh)) cua dung trong mach toan cau*.