Perhaps you should try some spelling variations:
thien van » thi van
dang xay » dang van, van xay
cuu thuc » cuu tac
thuc va » thuc vat, thuc dan, thuc day
van cuu » van cau, van chu, van cu
sach ty » sach thu, xach tay, sach hay
xay cho » day cho, cay cho, xay chen
sach tu » sach thu, cach tu, sach uu
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 tu))) or (sach y)) dang 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 tu))) OR (sach y)) dang 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 tu))) or (sach y)) dang xay cho. thien van cuu thuc va dan di cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((((sach ty) OR (sach tu))) or (sach y)) dang xay cho. thien van cuu thuc va dan di cua tre*.