Perhaps you should try some spelling variations:
thien van » thi van
thanh vai » thanh hai, thanh van, thanh oai
thanh tai » thanh hai, thanh toan, doanh tai
thu sach » tu sach, thuat sach, thuoc sach
nam mua » nam cua, nam qua, nam xua
mua ban » cua ban, qua ban
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang

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 y nang ((xa hoi) or (ma hoa)). thien van nam mua ban ((thanh vai) OR (thanh tai)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang ((xa hoi) OR (ma hoa)). thien van nam mua ban ((thanh vai) OR (thanh tai)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang ((xa hoi) or (ma hoa)). thien van nam mua ban ((thanh vai) OR (thanh tai)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang ((xa hoi) or (ma hoa)). thien van nam mua ban ((thanh vai) OR (thanh tai)) cuu tre*.