Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
chat xuc » chat huu, cam xuc, chao xu
tu sach » thu sach, te sach, tu cach
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
vu chat » va chat, ve chat, du chat
hieu vu » hieu va, hieu ve, hieu su
dan hoc » van hoc, dan toc, dai hoc
dan hoi » dai hoi, van hoi, dang khoi
ky tang » ky nang, ky dang, kho tang
su sach » so sach, vu sach
xuc va » duc va, tuc va, luc va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (su sach)) ky tang ((dan hoi) or (dan hoc)). hieu vu chat xuc va hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky tang ((dan hoi) OR (dan hoc)). hieu vu chat xuc va hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky tang ((dan hoi) or (dan hoc)). hieu vu chat xuc va hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ky tang ((dan hoi) or (dan hoc)). hieu vu chat xuc va hanh vai cua te*.