Perhaps you should try some spelling variations:
van nang » van quang, van ban, van dung
hanh lai » hanh lam, hanh tai, thanh lap
su sach » so sach, vu sach
lai cua » dai cua, hai cua, lai chau
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
cua te » cua tu
va cam » va cham, va cac, va cao
ve cai » va cai, ve cac, ve tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((van nang) or (van dong)) xa hoi. hieu ((ve cai) or (va cam)) thuc va hanh lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((van nang) OR (van dong)) xa hoi. hieu ((ve cai) OR (va cam)) thuc va hanh lai cua te.
• Adding a wildcard symbol may retrieve word variants: su sach ((van nang) or (van dong)) xa hoi. hieu ((ve cai) or (va cam)) thuc va hanh lai cua te*.