Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
canh trinh » canh tranh, hanh trinh, canh tinh
lieu tinh » trieu tinh, diep tinh
bien tinh » bi tinh, diep tinh, ban tinh
trinh vat » trinh van, trinh luat, sinh vat
vat thong » va thong, vat trong, mat thong
yen tinh » tuyen tinh
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((lieu tinh) or (((bien tinh) OR (yen tinh)))) - canh trinh vat thong cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((lieu tinh) OR (((bien tinh) OR (yen tinh)))) - canh trinh vat thong cong san toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((lieu tinh) or (((bien tinh) OR (yen tinh)))) - canh trinh vat thong cong san toan ban".
• Adding a wildcard symbol may retrieve word variants: ho ((lieu tinh) or (((bien tinh) OR (yen tinh)))) - canh trinh vat thong cong san toan ban*.