Perhaps you should try some spelling variations:
sach cam » sach cap, mach cam, sach tham
hieu van » hieu va, thien van, lieu va
dat luan » dan luan, dau luan, dat quang
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
nang xa » nang x, lang xa, nang ma
dau luc » cau luc, dau luan, dau nuoc
hanh le » thanh le, hanh ve, hanh de
cuu tre » cua tre, cau tren, cau treo
le cuu » le cua, le huu, le cau

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 cam nang xa hoi. hieu van ((dau luc) or (dat luan)) van hanh le cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach cam nang xa hoi. hieu van ((dau luc) OR (dat luan)) van hanh le cuu tre.
• Adding a wildcard symbol may retrieve word variants: te sach cam nang xa hoi. hieu van ((dau luc) or (dat luan)) van hanh le cuu tre*.