Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trung tuan » trung thanh, trung tam, tran tuan
hieu lang » chieu sang, hieu quang, nhieu tang
dung cong » dung trong
trong ca » trong cac, trong nha
cong van » cong vang, cong san, song van
van tuan » van quan, van ban, anh tuan
tuan tap » toan tap, tuan tai, tuyen tap

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 sach) or (hieu lang)) - hanh ((trong ca) or (trung tuan)) dung cong van tuan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (hieu lang)) - hanh ((trong ca) OR (trung tuan)) dung cong van tuan tap.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (hieu lang)) - hanh ((trong ca) or (trung tuan)) dung cong van tuan tap*.