Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
chat xuc » chat huu, cam xuc, chao xu
hanh tai » thanh tai, hang tai, han tai
ky sang » ky dang, ky tang, duy sang
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, cac cuoc
va hanh » van hanh, va thanh, va 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 sang) OR (ky nang)) ma hoa. hieu va ((cac xuc) or (chat xuc)) va hanh tai duc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ((ky sang) OR (ky nang)) ma hoa. hieu va ((cac xuc) OR (chat xuc)) va hanh tai duc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ((ky sang) OR (ky nang)) ma hoa. hieu va ((cac xuc) or (chat xuc)) va hanh tai duc tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ((ky sang) OR (ky nang)) ma hoa. hieu va ((cac xuc) or (chat xuc)) va hanh tai duc tre*.