Perhaps you should try some spelling variations:
nam thuoc » nam thu, nha thuoc, cay thuoc
cau treo » cau theo, cau tren, cau triet
nam thuc » am thuc, nam thu, nam tu
nang mai » nang ma, nang tai, nang cai
hanh tai » thanh tai, hang tai, han tai
lang mai » lang dai, lang hai, lang man
tai cau » tai cac, tai cao
xa hanh » xa thanh, xa khanh, va hanh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua

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 ky ((nang mai) or (lang mai)) hoi. hieu va ((nam thuc) OR (nam thuoc)) xa hanh tai cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang mai) OR (lang mai)) hoi. hieu va ((nam thuc) OR (nam thuoc)) xa hanh tai cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang mai) or (lang mai)) hoi. hieu va ((nam thuc) OR (nam thuoc)) xa hanh tai cau treo".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang mai) or (lang mai)) hoi. hieu va ((nam thuc) OR (nam thuoc)) xa hanh tai cau treo*.