Perhaps you should try some spelling variations:
sach ky » sach y, sach ty, sach kem
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
xuc van » luc van, xuc ban, thuc van
duc van » duc va, duc tan, duc manh
cuu tre » cua tre, cau tren, cau treo
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao
vi cuu » vi luu, vinh cuu

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