Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
nang mai » nang ma, nang tai, lang mai
quoc ban » quoc bao, quoc lan, quoc quan
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
luc van » luoc van, luu van, duc van
cuc ban » cua ban, cac ban, cuu ban
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach tu nang mai hoi. hieu va cac ((luc van) or (((quoc ban) or (cuc ban)))) hanh vi cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu nang mai hoi. hieu va cac ((luc van) OR (((quoc ban) OR (cuc ban)))) hanh vi cua thuoc.
• Adding a wildcard symbol may retrieve word variants: te sach tu nang mai hoi. hieu va cac ((luc van) or (((quoc ban) or (cuc ban)))) hanh vi cua thuoc*.