Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
thong cong » trong cong, tong cong, phong chong
tieu xanh » tieu danh, chieu xanh, dieu hanh
trinh va » trinh van, trinh vat, trinh ve
van khan » van khanh, van khang, van phan
khan cap » khan ap, than cap, khoan cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu xanh - canh trinh va ((thong cong) or (thong thong)) van khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - canh trinh va ((thong cong) OR (thong thong)) van khan cap.
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - canh trinh va ((thong cong) or (thong thong)) van khan cap*.