Perhaps you should try some spelling variations:
thu nang » thi nang, thu hang, tho nang
van hanh » van thanh, ban hanh, van anh
thu bang » thu ban, thu hang, chu bang
vu sach » vu bach, su sach, vu khach
cua tre » cua te, cua triet, dua tren
xuc van » duc van, luc van, vuc van
hieu ve » hieu va, hieu van
cuu tre » cau tren, cau treo
ve cam » ve cham, ve cac, va cam

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 ((thu nang) or (thu bang)) xa hoi. hieu ve cam xuc van hanh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((thu nang) OR (thu bang)) xa hoi. hieu ve cam xuc van hanh vi ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: vu sach ((thu nang) or (thu bang)) xa hoi. hieu ve cam xuc van hanh vi ((cua tre) or (cuu tre))*.