Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, ho chieu
thong lan » thuong lan, thong luan, thong lanh
tran van » luan van
trinh va » trinh van, trinh vat, trinh ve
lan than » ban than, van than, dan than
than ban » thanh ban, toan ban, than man

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sang - hanh ((tran van) or (trinh va)) thong thong lan than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - hanh ((tran van) OR (trinh va)) thong thong lan than ban*.