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