Perhaps you should try some spelling variations:
danh vai » danh sai, danh va, doanh van
lang van » dang van, tang van, hoang van
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, va hanh
cau duc » cao duc, cau luc, chu duc
hieu va » hieu qua
cua tre » cua te, cuu tre, cua triet
sach lo » sach dao, sach doi, sach hoi
lang xa » lang ha, dang xay

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach lo ((lang xa) or (lang van)) hoi. ((lieu va) or (hieu va)) cau duc va danh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach lo ((lang xa) OR (lang van)) hoi. ((lieu va) OR (hieu va)) cau duc va danh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach lo ((lang xa) or (lang van)) hoi. ((lieu va) or (hieu va)) cau duc va danh vai cua tre*.