Perhaps you should try some spelling variations:
cay thuoc » cua thuoc, nam thuoc, va thuoc
cham xuc » cam xuc, chat xuc, cham soc
van hanh » van thanh, ban hanh, van ban
vai cay » va cay, vai cac, vai gay
van anh » van thanh, tuan anh, van minh
tu sach » thu sach, su sach, te sach
vu cham » va cham, vu kham, tu cham
dai hai » dai han, dai hoi, dai tai
tai hoe » tai he, tai khoa, thai hoc
hieu vu » hieu va, hieu ve, hieu su
sach 2 » sach y
2 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 2 nang ((tai hoe) or (dai hai)). hieu vu cham xuc ((van hanh) or (van anh)) vai cay thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach 2 nang ((tai hoe) OR (dai hai)). hieu vu cham xuc ((van hanh) OR (van anh)) vai cay thuoc.
• Adding a wildcard symbol may retrieve word variants: tu sach 2 nang ((tai hoe) or (dai hai)). hieu vu cham xuc ((van hanh) or (van anh)) vai cay thuoc*.