Perhaps you should try some spelling variations:
lang trong » dung trong, cong trong, dong trong
chi sach » chinh sach, chieu sach, co sach
chu nang » chua nang, cuu nang, chu bang
cong van » cong vang, cong san, song van
van tuan » van quan, van ban, anh tuan
tuan cau » toan cau, quan cau, tuan cu
doi chi » doi khi
chuc » thuc, chua, phuc

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi sach - lang trong ((chu nang) or (chuc nang)) cong van tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sach - lang trong ((chu nang) OR (chuc nang)) cong van tuan cau.
• Adding a wildcard symbol may retrieve word variants: doi chi sach - lang trong ((chu nang) or (chuc nang)) cong van tuan cau*.