Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
ho chieu » theo chieu, hoc thieu, doi chieu
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap
va dang » van dang, da dang, va dong
va nang » van nang, da nang, cam nang
va lang » hoa lang

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

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