Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
chua viet » chuan viet, cua viet, chu viet
cham duc » pham duc, cham soc, pham duy
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va cham » va chat, va tham
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
duc ca » duc cac, duc va, duc ha
dan va » dan ca, ban va, han 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 y nang ma hoi. hieu va cham duc ca ((dan va) OR (doan va)) chua viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach y nang ma hoi. hieu va cham duc ca ((dan va) OR (doan va)) chua viet".
• Adding a wildcard symbol may retrieve word variants: thuoc sach y nang ma hoi. hieu va cham duc ca ((dan va) OR (doan va)) chua viet*.