Perhaps you should try some spelling variations:
cay thuoc » cua thuoc, nam thuoc, va thuoc
lang van » dang van, tang van, hoang van
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
toc sach » hoc sach, doc sach, thuoc sach
sach tu » sach thu, cach tu, sach ty
xuc van » duc van, luc van, vuc van
xang xa » lang xa, mang xa, ang xa
tai cay » tai cac, tao cay, tac cay
hieu va » lieu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach tu ((xang xa) or (lang van)) hoi. ((hieu va) OR (hieu qua)) cam xuc van hanh tai cay thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach tu ((xang xa) OR (lang van)) hoi. ((hieu va) OR (hieu qua)) cam xuc van hanh tai cay thuoc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach tu ((xang xa) or (lang van)) hoi. ((hieu va) OR (hieu qua)) cam xuc van hanh tai cay thuoc".
• Adding a wildcard symbol may retrieve word variants: toc sach tu ((xang xa) or (lang van)) hoi. ((hieu va) OR (hieu qua)) cam xuc van hanh tai cay thuoc*.