Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cham truc » cau truc, nham thuc, pham thuc
qua cham » qua hai, qua cac, va cham
hanh tai » thanh tai, hang tai, han tai
sach lo » sach dao, sach doi, sach hoi
nang xa » lang xa, mang xa, ang xa
nang ma » tang ma, sang ma, nang cao
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
tai va » thai va, mai va, tri va
thiet » thieu

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 lo ((((nang xa) or (nang ma))) or (nang x)) hoi. hieu qua cham truc va hanh tai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach lo ((((nang xa) OR (nang ma))) OR (nang x)) hoi. hieu qua cham truc va hanh tai va thiet.
• Adding a wildcard symbol may retrieve word variants: thuoc sach lo ((((nang xa) or (nang ma))) or (nang x)) hoi. hieu qua cham truc va hanh tai va thiet*.