Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, te sach, tu cach
hau xuc » chat xuc
lai cua » dai cua, hai cua, lai chau
vai cua » dai cua, hai cua, bai cua
xuc van » duc van, luc van, xuc ban
van hau » van ha, van hai, van dau
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
su sach » so sach, vu sach

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (su sach)) ty nang xa hoi. hieu van hau xuc van hanh ((vai cua) or (lai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ty nang xa hoi. hieu van hau xuc van hanh ((vai cua) OR (lai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ty nang xa hoi. hieu van hau xuc van hanh ((vai cua) or (lai cua)) tre*.