Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
chat xu » chat xuc, chao xu, chat huu
xu van » tu van, vu van, su van
va va » va van, va vai, va vat

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty nang xa hoi. hieu ve chat xu van hanh ((va va) or (va vua)) thieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. hieu ve chat xu van hanh ((va va) OR (va vua)) thieu.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. hieu ve chat xu van hanh ((va va) or (va vua)) thieu*.