Perhaps you should try some spelling variations:
thien van » thi van
cuu thuc » cuu tac
dang xay » dang van
sach ty » sach tu, sach thu, xach tay
thuc va » thuc vat, thuc dan, thuc day
van cuu » van cau, van chu, van cu
cua tre » cua te, cuu tre, cua triet
va dan » ca dan, va dao, va dau
dan di » danh di, dan da, dan de
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ty) or (sach y)) ((dang xay) OR (van xay)) cho. thien van cuu thuc va dan di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach y)) ((dang xay) OR (van xay)) cho. thien van cuu thuc va dan di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) or (sach y)) ((dang xay) OR (van xay)) cho. thien van cuu thuc va dan di cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach y)) ((dang xay) OR (van xay)) cho. thien van cuu thuc va dan di cua tre*.