Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thiet, trinh thuc
hanh trinh » canh tranh, hanh chinh
thuat hung » thuat dung, thuat ung, thuat xung
hien xanh » hien hanh, hien nhanh, chieu xanh
cong dan » cong san, cong tan, cong dong
chinh ca » chinh ta, chinh va, chinh tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - hanh trinh thuat hung ((cong dan) or (huong dan)) chinh ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh trinh thuat hung ((cong dan) OR (huong dan)) chinh ca.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh trinh thuat hung ((cong dan) or (huong dan)) chinh ca*.