Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
chat xuc » chat huu, cam xuc, chao xu
van hanh » van thanh, ban hanh, van anh
hanh tai » thanh tai, hang tai, han tai
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, cac cuoc
tai duc » tai cuc, mai duc, tai du
duc tre » duoc tren, duc tien
y sang » duy sang
_ sang » _ san

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