Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cham duc » pham duc, cham soc, pham duy
duy nang » dun nang, duy nong, duy sang
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
dao cau » dat cau, da cau, tao cau
dao cuu » dao huu, dao chu, dao cua
hieu va » lieu va, hieu qua
va cham » va chat, va tham
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa

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) or (thuoc sach)) duy nang ma hoi. hieu va cham duc va thanh ((dao cuu) OR (dao cau)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuoc sach)) duy nang ma hoi. hieu va cham duc va thanh ((dao cuu) OR (dao cau)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thuoc sach)) duy nang ma hoi. hieu va cham duc va thanh ((dao cuu) OR (dao cau)) tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuoc sach)) duy nang ma hoi. hieu va cham duc va thanh ((dao cuu) OR (dao cau)) tre*.