Perhaps you should try some spelling variations:
canh trang » canh tranh, hanh trang, banh trang
chieu sang » chieu sach, chieu xanh, hieu lang
trang vat » trang va, trang vai, tang vat
hieu van » hieu va, thien van, lieu va
dan than » dan chan, ban than, van 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: hoc ((chieu sang) or (hieu van)) - canh trang vat ((dung cong) or (dung trong)) dan than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (hieu van)) - canh trang vat ((dung cong) OR (dung trong)) dan than ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (hieu van)) - canh trang vat ((dung cong) or (dung trong)) dan than ban*.