Perhaps you should try some spelling variations:
chieu tinh » lieu tinh, chau tinh, che tinh
nhung cong » dung cong, thong cong, hang cong
kieu tinh » lieu tinh, diep tinh, bien tinh
hanh dong » anh dong, ha dong
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
toan cau » toan cao, toan ban, toan tap
dong va » dung va, dong ha, luong va

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

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