Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
danh vai » danh sai, danh va, doanh van
thu sach » thuat sach, thuoc sach, thu hoach
va danh » va dinh, va dan, va hanh
vai cua » dai cua, hai cua, lai cua
tu sach » su sach, te sach, tu cach
nang o » nang co, nang ho, nang ro
xuc va » duc va, tuc va, luc va
o hoc » co hoc, mo hoc, so hoc

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)) ky nang o hoc. hieu ((van lam) OR (van nam)) xuc va danh vai cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang o hoc. hieu ((van lam) OR (van nam)) xuc va danh vai cua thuoc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ky nang o hoc. hieu ((van lam) OR (van nam)) xuc va danh vai cua thuoc".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang o hoc. hieu ((van lam) OR (van nam)) xuc va danh vai cua thuoc*.