Perhaps you should try some spelling variations:
thu nang » thu hang, thu bang, tho nang
thi nang » thi cong, ki nang, thi hanh
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
cham duc » pham duc, cham soc, pham duy
va doanh » van doanh, vay doanh, va danh
doanh va » doan va, doanh tai, doanh cua
tu sach » thu sach, su sach, te sach
cua tre » cua te, cuu tre, cua triet
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: tu sach ((thu nang) or (thi nang)) xa hoi. hieu van cham duc va doanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((thu nang) OR (thi nang)) xa hoi. hieu van cham duc va doanh va cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((thu nang) or (thi nang)) xa hoi. hieu van cham duc va doanh va cua tre*.