Perhaps you should try some spelling variations:
chan thuong » phan thuong, han thuong, hang thuong
thuong cong » thong cong, thuong con, thuong dong
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
hoang van » hang va
dan tuyen » danh tuyen, dao tuyen, dan huyen
van chan » van chat, dan chan, van phan
cong dan » cong san, cong tan, huong dan

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) or (hieu lang)) - hoang van chan thuong cong dan tuyen tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (hieu lang)) - hoang van chan thuong cong dan tuyen tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (hieu lang)) - hoang van chan thuong cong dan tuyen tap*.