Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
dau tuc » dau tu, dao tuc, cau truc
tuc ban » thuc ban, truc ban, tu ban
hanh di » hanh vi, hang di, danh di
hanh de » hanh ve, hanh kem
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, xa hoi, ma hoa
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 ma 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 nang ma hoi. lieu va dau tuc ban ((hanh di) OR (hanh de)) cuu tre*.