Perhaps you should try some spelling variations:
cac thoi » cac toi, cac hop, cac tro
danh vai » danh sai, doanh van, dang van
sach ky » sac ky, sach y, sach ty
danh va » doanh va, hanh va, anh va
thoi xa » thoi xua, thi xa, thoi va
te sach » toc sach
hieu ve » hieu va, hieu van
nang xa » lang xa, nang ma, mang xa
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky ((nang xa) OR (nang x)) hoi. hieu ve cac thoi xa ((danh vai) or (danh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang xa) OR (nang x)) hoi. hieu ve cac thoi xa ((danh vai) OR (danh va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang xa) OR (nang x)) hoi. hieu ve cac thoi xa ((danh vai) or (danh va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang xa) OR (nang x)) hoi. hieu ve cac thoi xa ((danh vai) or (danh va)) cua tre*.