Perhaps you should try some spelling variations:
lang trong » dung trong, cong trong, dong trong
lang thong » lang thang, mang thong, hang thong
quan trung » quang trung, quan trong, xuan trung
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
cong van » cong vang, song van, cong tan
cong san » cong tac
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu sach - ((lang thong) OR (lang trong)) quan trung ((cong van) or (cong san)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - ((lang thong) OR (lang trong)) quan trung ((cong van) OR (cong san)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu sach - ((lang thong) OR (lang trong)) quan trung ((cong van) or (cong san)) toan ban".
• Adding a wildcard symbol may retrieve word variants: theo chu sach - ((lang thong) OR (lang trong)) quan trung ((cong van) or (cong san)) toan ban*.