Perhaps you should try some spelling variations:
hang di » hang doi, hang vi, hang dien
hanh di » hanh vi, hanh de, danh di
sach ty » sach tu, sach thu, xach tay
dau tuc » dau tu, dao tuc, cau truc
nang xa » nang x, lang xa, nang ma
cuu tre » cua tre, cau tren, cau treo
va dau » va dao
tuc va » thuc va, truc va, tuc xa

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach y)) nang xa hoi. lieu va dau tuc va ((hanh di) OR (hang di)) cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ty) OR (sach y)) nang xa hoi. lieu va dau tuc va ((hanh di) or (hang di)) cuu tre~".
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) OR (sach y)) nang xa hoi. lieu va dau tuc va ((hanh di) or (hang di)) cuu tre*.