Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
hanh trang » thanh trung, hanh trinh, minh trang
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
manh toan » thanh toan, anh tuan, tinh toan
hoc hieu » hoc thieu, hoc hien, doc hieu
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 hieu lang - ((hanh trang) OR (canh tranh)) cua ((nhung phuong) or (nhung cong)) manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - ((hanh trang) OR (canh tranh)) cua ((nhung phuong) OR (nhung cong)) manh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu lang - ((hanh trang) OR (canh tranh)) cua ((nhung phuong) or (nhung cong)) manh toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - ((hanh trang) OR (canh tranh)) cua ((nhung phuong) or (nhung cong)) manh toan cau*.