Perhaps you should try some spelling variations:
trinh thiet » trinh viet, trinh thi
hanh trinh » canh tranh, hanh chinh
thiet dang » thien dang, nhiet dong, nhiet nang
hien xanh » hien hanh, hien nhanh, chieu xanh
dang cong » dung cong
dan chinh » dang chinh, lan chinh, van chinh
chinh cau » chinh chau, chinh ca, chinh can
cong dan » cong san, cong tan, huong dan

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 thiet dang cong dan chinh cau~.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh trinh thiet dang cong dan chinh cau*.