Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
doan van » doan va, hoang van, luan van
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cham lo » cham o, cam lo, cham soc
va doan » va doanh, van doan, va dan
van cuu » van cau, van chu, van cu
cuu tre » cua tre, cau tren, cau treo
lo va » lo van, lao va, ly va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((ky nang) or (ty xang)) ((xa hoi) or (ma hoa)). hieu ve cham lo va doan van cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ky nang) OR (ty xang)) ((xa hoi) OR (ma hoa)). hieu ve cham lo va doan van cuu tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ((ky nang) or (ty xang)) ((xa hoi) or (ma hoa)). hieu ve cham lo va doan van cuu tre*.