Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
vu sach » vu bach, su sach, vu khach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
danh vi » hanh vi, dinh vi, danh di
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, duc va
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (van thanh)) ky nang xa hoi. hieu va cam ((tuc va) OR (tuc xa)) danh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (van thanh)) ky nang xa hoi. hieu va cam ((tuc va) OR (tuc xa)) danh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (van thanh)) ky nang xa hoi. hieu va cam ((tuc va) OR (tuc xa)) danh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (van thanh)) ky nang xa hoi. hieu va cam ((tuc va) OR (tuc xa)) danh vi cua tre*.