Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
dung cong » dung trong
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap
anh dao » lanh dao, hanh dao, anh dat
dao duc » giao duc, tao duoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: nho ((hieu lang) or (chieu sang)) - anh dao duc ((cong dong) or (dung cong)) dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nho ((hieu lang) OR (chieu sang)) - anh dao duc ((cong dong) OR (dung cong)) dan than cau.
• Adding a wildcard symbol may retrieve word variants: nho ((hieu lang) or (chieu sang)) - anh dao duc ((cong dong) or (dung cong)) dan than cau*.