Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
va danh » va dinh, va dan, va hanh
danh du » danh dau, danh tu, dinh du
ve cac » va cac, vien cac
du cau » cu cau, da cau, di cau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang x) OR (nang ma)) hoi. hieu ve cac duc va danh du cau tren~.
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang x) or (nang ma)) hoi. hieu ve cac duc va danh du cau tren*.