Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
nhieu tang » chieu sang, hieu lang, nhiet nang
dung cong » dung trong
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 dung » tac dung, hoc dung, toc nung
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 ((((chieu xanh) or (chieu sach))) or (nhieu tang)) - tinh dan toc dung cong toan phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((chieu xanh) OR (chieu sach))) OR (nhieu tang)) - tinh dan toc dung cong toan phan dau.
• Adding a wildcard symbol may retrieve word variants: hoc ((((chieu xanh) or (chieu sach))) or (nhieu tang)) - tinh dan toc dung cong toan phan dau*.