Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
lieu tinh » trieu tinh, diep tinh, bien tinh
hang cong » dang cong, hang nong, bang cong
dung cong » dung trong
doi lieu » duoc lieu, doi chieu, du lieu
trinh va » trinh van, trinh vat, trinh ve
tap toan » tap doan, tap quan, bai toan

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

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