Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
van bac » van ban, van bao, van hac
bac do » ban do, bac bo, bac ho
vi cua » vai cua, di cua
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu van bac do ((van hanh) OR (ban hanh)) vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang x hoi. hieu van bac do ((van hanh) OR (ban hanh)) vi cua te".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang x hoi. hieu van bac do ((van hanh) OR (ban hanh)) vi cua te*.