Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
hanh le » thanh le, hanh ve, hanh de
cau luc » cau truc, cau phuc
hau luc » hau loc, nhan luc, hieu luc
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
sach v » sach va, sach y, sach 2
le cua » ly cua

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 v ((nang xa) OR (lang xa)) hoi. hieu van ((hau luc) or (cau luc)) van hanh le cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach v ((nang xa) OR (lang xa)) hoi. hieu van ((hau luc) OR (cau luc)) van hanh le cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach v ((nang xa) OR (lang xa)) hoi. hieu van ((hau luc) or (cau luc)) van hanh le cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach v ((nang xa) OR (lang xa)) hoi. hieu van ((hau luc) or (cau luc)) van hanh le cua tre*.