Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
hanh di » hanh vi, hanh de, hang di
sach ly » sach y, sach lo, sach ty
hieu ve » hieu va, hieu van
ly lang » ly hang, ly vang, le lang
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
ha hoi » hoa hoi, xa hoi, va hoi
di cua » dai cua, doi cua, de cua

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 lang ((ha hoi) OR (ha noi)). hieu ve cam ((duc va) OR (thuc vat)) hanh di cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ly lang ((ha hoi) OR (ha noi)). hieu ve cam ((duc va) or (thuc vat)) hanh di cua tre~".
• Adding a wildcard symbol may retrieve word variants: vu sach ly lang ((ha hoi) OR (ha noi)). hieu ve cam ((duc va) or (thuc vat)) hanh di cua tre*.