Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
thanh va » hanh va, thanh ha, thanh ve
dang xay » dang van, van xay
cua tre » cua te, cuu tre, cua triet
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
truc va » thuc va, thuc vat, trung va
hieu ve » hieu va, hieu van
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
ca viet » va viet, co viet, hoa viet
ve cau » ke cau, va cau, ve cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky dang xay hoi. hieu ve cau truc va ((thanh va) or (thanh van)) ((cua tre) or (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky dang xay hoi. hieu ve cau truc va ((thanh va) OR (thanh van)) ((cua tre) OR (ca viet)).
• Adding a wildcard symbol may retrieve word variants: vu sach ky dang xay hoi. hieu ve cau truc va ((thanh va) or (thanh van)) ((cua tre) or (ca viet))*.