Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
nhiet nang » nhiet dong, viet nang, nhieu tang
nhung cong » dung cong, thong cong, hang cong
trinh cua » trinh luat, trinh quan, trinh luan
tinh cua » sinh cua, tinh chat, tranh cua
cong van » cong vang, cong san, song van
van van » tan van, san van, van vat

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 (nhiet nang)) - hanh ((trinh cua) OR (tinh cua)) nhung cong van van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (nhiet nang)) - hanh ((trinh cua) OR (tinh cua)) nhung cong van van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (nhiet nang)) - hanh ((trinh cua) OR (tinh cua)) nhung cong van van ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (nhiet nang)) - hanh ((trinh cua) OR (tinh cua)) nhung cong van van ban*.