Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
dau tuc » dau tu, dao tuc, cau truc
tuc van » thuc van, truc van, tuc va
hanh di » hanh de, danh di, xanh di
hang di » hang doi, hang vi, hang dien
cuu tre » cua tre, cau tren, cau treo
va dau » va dao

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 ky nang xa hoi. lieu va dau tuc van ((((hanh di) OR (hanh vi))) or (hang di)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang xa hoi. lieu va dau tuc van ((((hanh di) OR (hanh vi))) OR (hang di)) cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang xa hoi. lieu va dau tuc van ((((hanh di) OR (hanh vi))) or (hang di)) cuu tre*".