Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
thien anh » thien danh, tien anh, thien thanh
ve nhung » tu nhung
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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 ((hieu manh) OR (thien anh)) - hanh trinh ((ve nhung) OR (va nhung)) cong dan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (thien anh)) - hanh trinh ((ve nhung) OR (va nhung)) cong dan toan cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (thien anh)) - hanh trinh ((ve nhung) OR (va nhung)) cong dan toan cau*.