Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
tong cong » trong cong, dung cong, dang cong
cong cong » cong dong, trong cong, dung cong
trinh va » trinh van, trinh vat, trinh ve
than cau » toan cau, phan cau, than cap
phan dau » phan tu, hang dau
ha tinh » va tinh, may tinh
moc ha » hoc ha, toc ha, coc ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: moc ha tinh - canh trinh va ((tong cong) OR (cong cong)) dan ((than cau) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: moc ha tinh - canh trinh va ((tong cong) OR (cong cong)) dan ((than cau) OR (phan dau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "moc ha tinh - canh trinh va ((tong cong) OR (cong cong)) dan ((than cau) or (phan dau))".
• Adding a wildcard symbol may retrieve word variants: moc ha tinh - canh trinh va ((tong cong) OR (cong cong)) dan ((than cau) or (phan dau))*.