Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trong » hanh trang, anh trong, hinh trong
nang hoang » dang hoang, nang hang, quang hoang
hieu lang » chieu sang, hieu quang, nhieu tang
trong chu » trong thu, trong cho, trong che
hoang van » hang va
chu nang » chuc nang, chua nang, cuu nang
bao chat » cao chat, tao chat, ban chat
van bao » van ban, van dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (hieu lang)) - hanh trong chu nang hoang van bao chat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (hieu lang)) - hanh trong chu nang hoang van bao chat.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (hieu lang)) - hanh trong chu nang hoang van bao chat*.