Perhaps you should try some spelling variations:
cay thuoc » cua thuoc, nam thuoc, va thuoc
nang dai » nang dau, nang tai, lang dai
van hanh » van thanh, ban hanh, van anh
xuc van » duc van, luc van, vuc van
su sach » so sach, vu sach
dai hoi » dai hoc, dai hai, dai moi
va cham » va chat, va tham
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
cua tu » cua tuc, cua su, cua cu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang dai hoi. hieu ((ve cam) or (va cham)) xuc van hanh vi ((cua tu) or (cay thuoc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang dai hoi. hieu ((ve cam) OR (va cham)) xuc van hanh vi ((cua tu) OR (cay thuoc)).
• Adding a wildcard symbol may retrieve word variants: su sach y nang dai hoi. hieu ((ve cam) or (va cham)) xuc van hanh vi ((cua tu) or (cay thuoc))*.