Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
thuong con » thuong dong, truong cong, thong cong
tieu xanh » tieu danh, chieu xanh, dieu hanh
trinh va » trinh van, trinh vat, trinh ve
con van » chon van, cong van, can van
tai cao » thai cao, tai sao, tai cac
tao cao » bao cao, toan cao

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 - hanh trinh va thuong con van ((tai cao) OR (tao cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - hanh trinh va thuong con van ((tai cao) OR (tao cao))".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh trinh va thuong con van ((tai cao) OR (tao cao))*.