Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
sach doi » sach hoi, sach moi, sach dao
van cam » van nam, van lam, van cau
hanh di » hanh vi, hanh de, hang di
sach lo » sach dao, sach hoi, sach moi
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
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: vu ((sach lo) or (sach doi)) nang xa hoi. hieu van cam ((duc va) or (thuc vat)) hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach lo) OR (sach doi)) nang xa hoi. hieu van cam ((duc va) OR (thuc vat)) hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: vu ((sach lo) or (sach doi)) nang xa hoi. hieu van cam ((duc va) or (thuc vat)) hanh di cua tre*.