Perhaps you should try some spelling variations:
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty mang » ty xang, ty hang, tin mang
mang xa » lang xa, mang may, dang xay
hieu va » lieu va, hieu qua
cac duc » cao duc, cac dac, cac nuoc
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
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: su sach ty mang xa hoi. hieu va ((cac duc) OR (cac du)) va hanh vi cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty mang xa hoi. hieu va ((cac duc) OR (cac du)) va hanh vi cuu tre*".