Perhaps you should try some spelling variations:
so sanh » do sanh
hanh de » hanh ve, hanh kem
hanh di » hanh vi, hang di, danh di
tuc van » thuc van, truc van, tuc va
dau tuc » dau tu, dao tuc, cau truc
vu sach » vu bach, su sach, vu khach
cuu tre » cua tre, cau tren, cau treo
va dau » va dao
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sanh) or (vu sach)) ky nang x hoi. lieu va dau tuc van ((hanh di) OR (hanh de)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sanh) OR (vu sach)) ky nang x hoi. lieu va dau tuc van ((hanh di) OR (hanh de)) cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sanh) or (vu sach)) ky nang x hoi. lieu va dau tuc van ((hanh di) OR (hanh de)) cuu tre*".