Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
cua tre » cua te, cua triet, dua tren
xuc van » duc van, luc van, vuc van
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
tang ma » mang may, tang van
tang xa » trang xa, lang xa, tang ha
cuu tre » cau tren, cau treo
va cam » va cham, va cac, va cao

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 ((tang xa) OR (tang ma)) hoi. hieu va cam xuc van hanh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((tang xa) OR (tang ma)) hoi. hieu va cam xuc van hanh vi ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((tang xa) OR (tang ma)) hoi. hieu va cam xuc van hanh vi ((cua tre) or (cuu tre))*".