Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
va thanh » gia thanh, ban thanh, va tinh
chat xuc » chat huu, cam xuc, chao xu
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, cac cuoc
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va danh, ban hanh
dang ma » dang mau, dang mam, dang mat
ky dang » ky nang, ky danh
tai duc » tai cuc, mai duc, tai du
duc tre » duoc tren, duc tien

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 ky dang ma hoa. hieu va ((cac xuc) or (chat xuc)) ((va hanh) OR (va thanh)) tai duc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky dang ma hoa. hieu va ((cac xuc) OR (chat xuc)) ((va hanh) OR (va thanh)) tai duc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky dang ma hoa. hieu va ((cac xuc) or (chat xuc)) ((va hanh) OR (va thanh)) tai duc tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky dang ma hoa. hieu va ((cac xuc) or (chat xuc)) ((va hanh) OR (va thanh)) tai duc tre*.