Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
doanh van » doan van, doanh va, doanh ban
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
danh vai » danh sai, danh va, dang van
mang xa » lang xa, mang may, dang xay
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
y mang » cay mang

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach y mang xa hoi. hieu va cac nuoc va ((danh vai) or (doanh van)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y mang xa hoi. hieu va cac nuoc va ((danh vai) OR (doanh van)) cua tre.
• Adding a wildcard symbol may retrieve word variants: thuat sach y mang xa hoi. hieu va cac nuoc va ((danh vai) or (doanh van)) cua tre*.