Perhaps you should try some spelling variations:
hanh trinh » canh tranh
hieu manh » chieu xanh, hieu nganh, dieu hanh
dung cong » dung trong
hoc hieu » hoc thieu, hoc hien, doc hieu
cua dung » cua dang, cua dong, qua dung
cong anh » cong danh, dong anh, hong anh
tuan cau » toan cau, quan cau, tuan cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - ((hanh trinh) OR (hanh chinh)) cua dung cong anh tuan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - ((hanh trinh) OR (hanh chinh)) cua dung cong anh tuan cau".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - ((hanh trinh) OR (hanh chinh)) cua dung cong anh tuan cau*.