Perhaps you should try some spelling variations:
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
hanh dinh » thanh dinh, hinh dinh, anh dinh
toc sach » hoc sach, doc sach, thuoc sach
pham cuc » pham chuc, pham duc, pham cua
cau tren » cu tren, dau tren, ca tren
cuc ban » cua ban, cac ban, cuu ban
nang xa » nang x, lang xa, nang ma
vu sach » vu bach, su sach, vu khach
hieu v » hieu va, hieu ve, hieu 2
v pham » vi pham, d pham

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (vu sach)) ky nang xa hoi. hieu v pham cuc ban ((hanh dinh) OR (hanh tinh)) cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (vu sach)) ky nang xa hoi. hieu v pham cuc ban ((hanh dinh) OR (hanh tinh)) cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (vu sach)) ky nang xa hoi. hieu v pham cuc ban ((hanh dinh) OR (hanh tinh)) cau tren".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (vu sach)) ky nang xa hoi. hieu v pham cuc ban ((hanh dinh) OR (hanh tinh)) cau tren*.