Perhaps you should try some spelling variations:
sach nay » sach hay, sach vay, sach nang
nay tang » nam tang, tay tang, anai tang
nam thuc » nam thuoc, am thuc, nam thu
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
tang ma » mang may, tang van
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, dam thuc
hanh li » nhanh li, hanh vi, han li
ca tren » cau tren, cu tren, la tren
li ca » ly ca

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 nay tang ma hoa. hieu va ((cam tuc) or (nam thuc)) van hanh li ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach nay tang ma hoa. hieu va ((cam tuc) OR (nam thuc)) van hanh li ca tren.
• Adding a wildcard symbol may retrieve word variants: te sach nay tang ma hoa. hieu va ((cam tuc) or (nam thuc)) van hanh li ca tren*.