Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
hanh vai » hanh vi, hanh va, hanh tai
vu sach » vu bach, su sach
so sach » so sanh, bo sach, co sach
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
cac tu » cac thu, cach tu, cac du
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: ((((vu sach) OR (vu khach))) or (so sach)) ky nang x hoi. hieu va cac tu va hanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((vu sach) OR (vu khach))) OR (so sach)) ky nang x hoi. hieu va cac tu va hanh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((vu sach) OR (vu khach))) or (so sach)) ky nang x hoi. hieu va cac tu va hanh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((((vu sach) OR (vu khach))) or (so sach)) ky nang x hoi. hieu va cac tu va hanh vai cuu tre*.