Perhaps you should try some spelling variations:
hanh de » hanh ve, hanh kem
hanh di » hanh vi, hang di, danh di
tuc ban » thuc ban, truc ban, tu ban
sach ty » sach y, sach thu, xach tay
dau tuc » dau tu, dao tuc, cau truc
nang xa » nang x, lang xa, nang ma
sach tu » sach thu, cach tu, sach uu
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: so ((sach ty) OR (sach tu)) nang xa hoi. lieu va dau tuc ban ((hanh di) or (hanh de)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach ty) OR (sach tu)) nang xa hoi. lieu va dau tuc ban ((hanh di) OR (hanh de)) cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach ty) OR (sach tu)) nang xa hoi. lieu va dau tuc ban ((hanh di) or (hanh de)) cuu tre*".