Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ly » sach y, sach lo, sach ty
tinh di » tinh doi, trinh di, tinh da
thuc va » thuc vat, thuc dan, thuc day
chuc va » thuc vat
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
hieu ve » hieu van
vang ma » tang ma, nang ma, sang ma
ly vang » ly hang, ly van, ly quang
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: tu sach ly vang ma hoa. ((hieu ve) or (hieu va)) cau ((chuc va) OR (thuc va)) tinh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly vang ma hoa. ((hieu ve) OR (hieu va)) cau ((chuc va) OR (thuc va)) tinh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ly vang ma hoa. ((hieu ve) or (hieu va)) cau ((chuc va) OR (thuc va)) tinh di cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ly vang ma hoa. ((hieu ve) or (hieu va)) cau ((chuc va) OR (thuc va)) tinh di cua tre*.