Perhaps you should try some spelling variations:
thu nang » thi nang, thu hang, tho nang
thai cua » than cua, tai cuc, tri cua
thu bang » thu ban, thu hang, chu bang
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
vu sach » vu bach, su sach, vu khach
va hanh » van hanh, va thanh, va danh
van bao » van ban, van dao
bao luc » bao thuc
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 ((thu nang) or (thu bang)) xa hoi. hieu van bao luc ((va hanh) or (ban hanh)) thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((thu nang) OR (thu bang)) xa hoi. hieu van bao luc ((va hanh) OR (ban hanh)) thai cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sach ((thu nang) or (thu bang)) xa hoi. hieu van bao luc ((va hanh) or (ban hanh)) thai cua tre*.