Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
hanh trang » thanh trung, minh trang, tinh trang
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, diep tinh, bien tinh
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap
ho lieu » so lieu, co lieu, ho kieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho lieu tinh - ((((hanh trang) OR (canh tranh))) or (hanh trinh)) va nhung cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho lieu tinh - ((((hanh trang) OR (canh tranh))) OR (hanh trinh)) va nhung cong tan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho lieu tinh - ((((hanh trang) OR (canh tranh))) or (hanh trinh)) va nhung cong tan toan cao".
• Adding a wildcard symbol may retrieve word variants: ho lieu tinh - ((((hanh trang) OR (canh tranh))) or (hanh trinh)) va nhung cong tan toan cao*.