Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
sach hoi » sach doi, sach moi, cach thoi
lang van » dang van, tang van, hoang van
thuc va » thuc vat, thuc dan, thuc day
vai cua » dai cua, hai cua, lai cua
hieu va » lieu va, hieu qua
sach lo » sach dao, sach doi, sach moi
van hoi » van hoa, van hoc, van hoe
tuc va » truc va, tuc xa, duc va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach lo) or (sach hoi)) lang van hoi. hieu va cac ((tuc va) OR (thuc va)) hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach lo) OR (sach hoi)) lang van hoi. hieu va cac ((tuc va) OR (thuc va)) hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach lo) or (sach hoi)) lang van hoi. hieu va cac ((tuc va) OR (thuc va)) hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: tu ((sach lo) or (sach hoi)) lang van hoi. hieu va cac ((tuc va) OR (thuc va)) hanh vai cua te*.