Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
cong thanh » cong trinh, cong tan, truong thanh
dong thanh » truong thanh
hoc chieu » hoc thieu, ho chieu, hoc hien
tinh cua » trinh cua, tinh chat, tranh cua
sinh cua » manh cua, dinh cuu, sinh va
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 sang - hanh ((tinh cua) or (sinh cua)) nhung ((cong thanh) or (dong thanh)) phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - hanh ((tinh cua) OR (sinh cua)) nhung ((cong thanh) OR (dong thanh)) phan dau.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - hanh ((tinh cua) or (sinh cua)) nhung ((cong thanh) or (dong thanh)) phan dau*.