Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
bach ty » xach tay, bach thu
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, sach thu
luc va » duc va, tuc va, loc va
di cua » dai cua, doi cua, de cua
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu ((bach ty) or (sach ty)) lang van hoa. hieu ve cac ((luc va) or (thuc vat)) hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((bach ty) OR (sach ty)) lang van hoa. hieu ve cac ((luc va) OR (thuc vat)) hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: vu ((bach ty) or (sach ty)) lang van hoa. hieu ve cac ((luc va) or (thuc vat)) hanh di cua tre*.