Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
sach hoi » sach doi, sach moi, cach thoi
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
van hoi » van hoc, van hoe, van loi
sach lo » sach dao, sach doi, sach moi
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac tac
cua te » cua tu
tuc va » thuc va, truc va, tuc xa

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) OR (van hoa)). hieu va cac tuc 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) OR (van hoa)). hieu va cac tuc 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) OR (van hoa)). hieu va cac tuc va hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: tu ((sach lo) or (sach hoi)) lang ((van hoi) OR (van hoa)). hieu va cac tuc va hanh vai cua te*.