Perhaps you should try some spelling variations:
cong thong » cong thuong, cong trong, dong thong
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu manh » hieu nganh, dieu hanh, hien hanh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
thong duy » thong day, thong dung, thong thuy
tinh cua » trinh cua, sinh cua, tinh chat
duy phan » duc phan, dung phan, duy khanh
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((chieu xanh) or (hieu manh)) - hanh tinh cua cong thong duy phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((chieu xanh) OR (hieu manh)) - hanh tinh cua cong thong duy phan dau*.