Perhaps you should try some spelling variations:
sach chu » sach che, sach thu, sach thue
chu bang » thu bang, chuc nang, chu quang
doanh va » doan va, doanh tai, doanh cua
va doanh » van doanh, vay doanh, va danh
kham xuc » kham xung, kham cuoc, cam xuc
vu kham » vu khanh
hieu vu » hieu va, hieu ve, hieu su
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
va hoc » van hoc
xuc va » duc va, tuc va, luc va
va hoi » va hoa
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach chu bang ((((va hoi) or (xa hoi))) or (va hoc)). hieu vu kham xuc va doanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach chu bang ((((va hoi) OR (xa hoi))) OR (va hoc)). hieu vu kham xuc va doanh va cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach chu bang ((((va hoi) or (xa hoi))) or (va hoc)). hieu vu kham xuc va doanh va cua tre*.