Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cham tuc » nham thuc, pham thuc, tham thuc
nang mai » nang ma, nang tai, lang mai
hoi cua » hoi chuc
doi cua » dai cua
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
hieu ve » hieu van
mai hoi » mai khoi, dai hoi, lai hoi
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ky nang mai hoi. ((hieu ve) or (hieu va)) cham tuc va hanh ((doi cua) OR (hoi cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky nang mai hoi. ((hieu ve) OR (hieu va)) cham tuc va hanh ((doi cua) OR (hoi cua)) te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky nang mai hoi. ((hieu ve) or (hieu va)) cham tuc va hanh ((doi cua) OR (hoi cua)) te*".