Perhaps you should try some spelling variations:
cang thang » cong thanh, dang thanh
hieu lang » chieu sang, hieu quang, nhieu tang
van thang » van thanh, van khang, van hang
thong qua » thong quan, thong cua, thong tu
hoc hieu » hoc thieu, hoc hien, doc hieu
qua tuan » qua quan, qua tan, qua than
tuan ban » tuan bang, toan ban, luan ban
va hang » van hang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu lang - cang thang ((va hang) or (van thang)) thong qua tuan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - cang thang ((va hang) OR (van thang)) thong qua tuan ban.
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - cang thang ((va hang) or (van thang)) thong qua tuan ban*.