Perhaps you should try some spelling variations:
thanh vien » nhan vien, thanh van
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
vien cua » viec cua, dien cua, tien cua
vu sach » vu bach, su sach, vu khach
so sach » so sanh, bo sach, hoc sach
co sach » bo sach, cuon sach, hoc sach
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
van cau » van dau, van hau, van chat
truc va » thuc va, thuc vat, trung va
cua tre » cua te, cuu tre, cua triet

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 (((so sach) or (co sach)))) ky dang xa hoi. hieu van cau truc va thanh vien cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (((so sach) OR (co sach)))) ky dang xa hoi. hieu van cau truc va thanh vien cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (((so sach) or (co sach)))) ky dang xa hoi. hieu van cau truc va thanh vien cua tre*.