Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van ban
hau truc » cau truc, hang truc, hoc truc
te sach » toc sach
van anh » van thanh, tuan anh, van minh
sach ty » sach y, sach tu, sach thu
van hau » van ha, van hai, van dau
nang xa » lang xa, nang ma, mang xa
cua tre » cua te, cuu tre, cua triet
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 ty ((nang xa) OR (nang x)) hoi. hieu van hau truc ((van hanh) or (van anh)) le cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((nang xa) OR (nang x)) hoi. hieu van hau truc ((van hanh) OR (van anh)) le cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((nang xa) OR (nang x)) hoi. hieu van hau truc ((van hanh) or (van anh)) le cua tre*".