Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
nhung cong » dung cong, thong cong, hang cong
tieu tinh » trieu tinh, tieu trinh, lieu tinh
tan toan » tan tran, tap toan, van toan
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: theo tieu tinh - hanh trinh quan ((nhung cong) or (dung trong)) tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu tinh - hanh trinh quan ((nhung cong) OR (dung trong)) tan toan cau.
• Adding a wildcard symbol may retrieve word variants: theo tieu tinh - hanh trinh quan ((nhung cong) or (dung trong)) tan toan cau*.