Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hanh doi » thanh doi, hanh noi, hang doi
doi cua » dai cua, hoi cua
sach ly » sach y, sach ty, sach hay
lang xa » lang ha, dang xay, lang van
sach lo » sach dao, sach doi, sach hoi
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach ly) OR (sach lo)) lang xa hoi. hieu va cam ((duc va) OR (thuc vat)) hanh doi cua viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sach ly) OR (sach lo)) lang xa hoi. hieu va cam ((duc va) or (thuc vat)) hanh doi cua viet~".
• Adding a wildcard symbol may retrieve word variants: vu ((sach ly) OR (sach lo)) lang xa hoi. hieu va cam ((duc va) or (thuc vat)) hanh doi cua viet*.