Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
nhan lang » nhanh lang, nhan dang, nhon lang
hieu lang » chieu sang, hieu quang, nhieu tang
tong cong » trong cong, cong cong, dung cong
cong hach » cong sach, cong thanh, cong khanh
hach toan » thanh toan, manh toan
trang va » tran van, hang va
toan cau » toan cao, toan ban, toan tap
va tong » va thong, va tuong, va trong

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

• Performing a fuzzy search may retrieve terms with similar spellings: thien ((nhan lang) or (hieu lang)) - hanh trang va tong cong hach toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thien ((nhan lang) OR (hieu lang)) - hanh trang va tong cong hach toan cau.
• Adding a wildcard symbol may retrieve word variants: thien ((nhan lang) or (hieu lang)) - hanh trang va tong cong hach toan cau*.