Perhaps you should try some spelling variations:
cay thuoc » cua thuoc, nam thuoc, va thuoc
van hanh » van thanh, ban hanh, van ban
chat xuc » chat huu, cam xuc, chao xu
van anh » van thanh, tuan anh, van minh
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
dai hai » dai han, dai hoi, dai tai
tai hoe » tai he, tai khoa, thai hoc
ve chat » va chat, van chat
y nang » ky nang, ly nang, v nang
vi cay » voi cay, va cay, si cay

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 y nang ((tai hoe) or (dai hai)). hieu ve chat xuc ((van hanh) or (van anh)) vi cay thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ((tai hoe) OR (dai hai)). hieu ve chat xuc ((van hanh) OR (van anh)) vi cay thuoc.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((tai hoe) or (dai hai)). hieu ve chat xuc ((van hanh) or (van anh)) vi cay thuoc*.