Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thiet, trinh thuc
thuat nhung » thuat hung, thuat chung, thuat chuong
hanh trinh » canh tranh, hanh chinh
hien xanh » hien hanh, hien nhanh, chieu xanh
chinh cau » chinh chau, chinh ca, chinh can
cong dan » cong san, cong tan, cong dong

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 nhung ((cong dan) OR (huong dan)) chinh cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - hanh trinh thuat nhung ((cong dan) OR (huong dan)) chinh cau".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh trinh thuat nhung ((cong dan) OR (huong dan)) chinh cau*.