Perhaps you should try some spelling variations:
cay thuoc » cua thuoc, nam thuoc, va thuoc
cua nuoc » cua quoc, cua nguoi, cua thuoc
thu sach » thuat sach, thuoc sach, thu hoach
nang mai » nang ma, nang tai, lang mai
van hanh » van thanh, ban hanh, van anh
xuc van » duc van, luc van, vuc van
hanh ve » hanh vi, hanh va, hanh kem
tu sach » su sach, te sach, tu cach
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
cac xuc » cam xuc, cac nuoc, chat xuc
y nang » ky nang, ly nang, v nang

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 (thu sach)) y nang mai hoi. hieu va cac xuc van hanh ve ((cua nuoc) or (cay thuoc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y nang mai hoi. hieu va cac xuc van hanh ve ((cua nuoc) OR (cay thuoc)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) y nang mai hoi. hieu va cac xuc van hanh ve ((cua nuoc) or (cay thuoc))*.