Perhaps you should try some spelling variations:
thanh tuc » thanh tu, thanh tuu, thanh tung
danh sai » dung sai, danh bat, danh dau
danh vai » danh va, doanh van, dang van
thu sach » tu sach, thuat sach, thuoc sach
cau tren » cu tren, dau tren, ca tren
hieu ve » hieu va, hieu van
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
tuc va » thuc va, truc va, tuc xa
x hoi » xa hoi, o hoi, x ho

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 tu nang x hoi. ((hieu ve) or (lieu va)) thanh tuc va ((danh vai) OR (danh sai)) cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach tu nang x hoi. ((hieu ve) OR (lieu va)) thanh tuc va ((danh vai) OR (danh sai)) cau tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach tu nang x hoi. ((hieu ve) or (lieu va)) thanh tuc va ((danh vai) OR (danh sai)) cau tren*".