Perhaps you should try some spelling variations:
dang xay » dang van
danh hai » dang hai, lanh hai, manh hai
su sach » so sach
vu sach » vu bach, vu khach
truc va » thuc va, thuc vat, trung va
va danh » va dinh, va dan, va hanh
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
va cau » van cau, va cac, va dau

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) or (vu sach)) ky ((dang xay) OR (van xay)) hoi. lieu va cau truc va danh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky ((dang xay) OR (van xay)) hoi. lieu va cau truc va danh hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ky ((dang xay) OR (van xay)) hoi. lieu va cau truc va danh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky ((dang xay) OR (van xay)) hoi. lieu va cau truc va danh hai cua tre*.