Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
lieu tinh » trieu tinh, diep tinh, bien tinh
bang cong » dang cong, bang song, dung cong
hang cong » dang cong, hang nong, thanh cong
doi lieu » duoc lieu, doi chieu, du lieu
trinh va » trinh van, trinh vat, trinh ve
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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 - canh trinh va ((bang cong) or (hang cong)) dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi lieu tinh - canh trinh va ((bang cong) OR (hang cong)) dan toan cao.
• Adding a wildcard symbol may retrieve word variants: doi lieu tinh - canh trinh va ((bang cong) or (hang cong)) dan toan cao*.