Perhaps you should try some spelling variations:
thieu mang » thieu khang, thieu quang, trien mang
thien van » thi van
hanh vin » hanh tin, hanh van, thanh vien
tu sach » thu sach, su sach, te sach
may hoi » may thoi, tay hoi, mai hoi
van cam » van nam, van lam, van cau
xuc van » duc van, luc van, vuc van
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: tu sach thieu mang may hoi. thien van cam xuc van ((hanh vin) or (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thieu mang may hoi. thien van cam xuc van ((hanh vin) OR (hanh vi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach thieu mang may hoi. thien van cam xuc van ((hanh vin) or (hanh vi)) cua tre*.