Perhaps you should try some spelling variations:
dong thanh » truong thanh
cam suc » cam xuc, cao suc, cham soc
tai cuu » tai cuc, tai buu, tai cua
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach kem
lang xa » lang ha, dang xay, lang van
sach ty » sach y, sach tu, sach thu
cuu tre » cua tre, cau tren, cau treo
ve cam » ve cham, ve cac, va cam

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 ty)) lang xa hoi. hieu ve cam suc ((dinh thanh) or (dong thanh)) tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach ty)) lang xa hoi. hieu ve cam suc ((dinh thanh) OR (dong thanh)) tai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach ty)) lang xa hoi. hieu ve cam suc ((dinh thanh) or (dong thanh)) tai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sach ty)) lang xa hoi. hieu ve cam suc ((dinh thanh) or (dong thanh)) tai cuu tre*.