Perhaps you should try some spelling variations:
thieu nghi » thieu nhi, thich nghi, theo nghi
nhung van » phung van, nhung bai, nhung cau
nghi cua » nghia cua, nghe cua, ngai cua
thu sach » thuat sach, thuoc sach, thu hoach
tu sach » su sach, te sach, tu cach
do va » do van, so va
o va » so va, co va, bo va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thu sach)) (nha or nhat) toc thieu nghi cua ets : nhung van ((o va) OR (do va)) đai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) (nha OR nhat) toc thieu nghi cua ets : nhung van ((o va) OR (do va)) đai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) (nha or nhat) toc thieu nghi cua ets : nhung van ((o va) OR (do va)) đai".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) (nha or nhat) toc thieu nghi cua ets : nhung van ((o va) OR (do va)) đai*.