Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
hanh vinh » thanh vinh, khanh vinh, hanh tinh
cau tren » cu tren, dau tren, ca tren
vinh cau » sinh cau, vinh cuu, minh cau
nang mai » nang ma, nang tai, lang mai
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
sach ly » sach y, sach lo, sach ty
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
ly nang » ky nang, ly hang, ly vang
cam tuc » cam xuc, cam tu, nam thuc

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ly nang mai hoi. hieu va ((cam tuc) or (nam thuoc)) va hanh vinh cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly nang mai hoi. hieu va ((cam tuc) OR (nam thuoc)) va hanh vinh cau tren.
• Adding a wildcard symbol may retrieve word variants: tu sach ly nang mai hoi. hieu va ((cam tuc) or (nam thuoc)) va hanh vinh cau tren*.