Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
te sach » toc sach
nang xa » nang x, lang xa, nang ma
van dam » van nam, van dao, van dau
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
su viet » so viet
dam tu » nam tu, cam tu, tam tu

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) or (hoc sinh)) ky nang xa hoi. hieu van dam tu va hanh va su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (hoc sinh)) ky nang xa hoi. hieu van dam tu va hanh va su viet.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (hoc sinh)) ky nang xa hoi. hieu van dam tu va hanh va su viet*.