Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
hung cong » nhung cong, hung cuong, phung cong
cong toan » cong tan, cong hoan, cong tuan
toan phan » thanh phan, toan ban, hoa phan
tinh dan » trinh dan, tinh da, binh dan
toc hung » toc nung, hoc hung, toc muong
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: hoc ((dieu hanh) or (((chieu sang) or (chieu sach)))) - tinh dan toc hung cong toan phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((dieu hanh) OR (((chieu sang) OR (chieu sach)))) - tinh dan toc hung cong toan phan dau.
• Adding a wildcard symbol may retrieve word variants: hoc ((dieu hanh) or (((chieu sang) or (chieu sach)))) - tinh dan toc hung cong toan phan dau*.