Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, nhung don
trinh cua » tinh cua, trinh luat, trinh quan
hang cong » dang cong, hang nong, bang cong
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap
ha tinh » va tinh, may tinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu tinh) or (ha tinh)) - hanh trinh cua ((nhung cong) or (hang cong)) tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu tinh) OR (ha tinh)) - hanh trinh cua ((nhung cong) OR (hang cong)) tan toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu tinh) or (ha tinh)) - hanh trinh cua ((nhung cong) or (hang cong)) tan toan cau*.