Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
van hanh » van thanh, ban hanh, van anh
sach ky » sac ky, sach ty, sach kem
van hoi » van hoa, van hoc, van hoe
nam xua » nam mua, nam qua, nam luat
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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 ky) or (sach y)) lang van hoi. lieu va ((nam xua) OR (nam cua)) van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) lang van hoi. lieu va ((nam xua) OR (nam cua)) van hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach y)) lang van hoi. lieu va ((nam xua) OR (nam cua)) van hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach y)) lang van hoi. lieu va ((nam xua) OR (nam cua)) van hanh vi cua tre*.