Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, kieu tinh
hieu quang » thieu quang, hieu quan, hieu qua
thanh tung » thanh cong
chau tinh » cuu tinh, ha tinh, cua tinh
dung cong » dung trong
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
toan cao » toan ban, toan tap
tung va » trung va, tuong va, dung va
va dung » van dung, va duong, vat dung

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) OR (chau tinh))) or (hieu quang)) - thanh tung va dung cong tap toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((((chieu tinh) OR (chau tinh))) OR (hieu quang)) - thanh tung va dung cong tap toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((((chieu tinh) OR (chau tinh))) or (hieu quang)) - thanh tung va dung cong tap toan cao*".