Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu lang » chieu sang, hieu quang, nhieu tang
trinh cua » tinh cua, trinh luat, trinh quan
dung cong » dung trong
doi hieu » doi chieu, doc hieu, doi hien
cua dung » cua dang, cua dong, qua dung
viec va » vien va, viec cua, viec lam
dien va » dien hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - hanh trinh cua dung cong ((viec va) or (dien va)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - hanh trinh cua dung cong ((viec va) OR (dien va)) cau.
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - hanh trinh cua dung cong ((viec va) or (dien va)) cau*.