Perhaps you should try some spelling variations:
danh thai » anh thai, dang thai, dinh thai
thai cua » than cua, tai cuc, tri cua
dang xay » dang van, van xay
sach ky » sac ky, sach y, sach ty
va danh » va dinh, va dan, va hanh
cac luc » cau luc, cac nuoc, cac cuoc
tu sach » thu sach, su sach, te sach
lang xa » lang ha, lang van
cua tre » cua te, cuu tre, cua triet

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