Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
van hanh » van thanh, ban hanh, van anh
sach va » sach xa, sach ha, sach dao
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
sach v » sach y, sach 2, sach vay
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: toc ((sach v) OR (sach va)) nang xa hoi. hieu va cac xuc van hanh vi ((cua thuoc) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach v) OR (sach va)) nang xa hoi. hieu va cac xuc van hanh vi ((cua thuoc) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach v) OR (sach va)) nang xa hoi. hieu va cac xuc van hanh vi ((cua thuoc) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: toc ((sach v) OR (sach va)) nang xa hoi. hieu va cac xuc van hanh vi ((cua thuoc) or (cua tu))*.