Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
dinh toai » dinh toi, dinh tai, tinh toan
toai cua » thai cua, toan cua, loai cua
sach ty » sach y, sach tu, sach thu
xang ma » tang ma, nang ma, sang ma
hieu vu » hieu ve, hieu su, dieu vu
hieu va » lieu va, hieu qua
cham lo » cham o, cam lo, cham soc
va dinh » van dinh, va kinh, va tinh
cua te » cua tu
lo va » lo van, lao va, ly va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ty xang ma hoa. ((hieu vu) OR (hieu va)) cham lo va dinh toai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ty xang ma hoa. ((hieu vu) OR (hieu va)) cham lo va dinh toai cua te".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ty xang ma hoa. ((hieu vu) OR (hieu va)) cham lo va dinh toai cua te*.