Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
te sach » toc sach
xanh de » hanh de, xanh di, thanh de
va xanh » va danh, va hanh, va anh
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, dang xay, lang van
nang ma » tang ma, sang ma, nang cao
ve cac » va cac
luc va » duc va, tuc va, loc va
de cua » le cua, te cua, dieu cua

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 y ((nang ma) or (lang xa)) hoi. hieu ((ve cac) or (vien cac)) luc va xanh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang ma) OR (lang xa)) hoi. hieu ((ve cac) OR (vien cac)) luc va xanh de cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang ma) or (lang xa)) hoi. hieu ((ve cac) or (vien cac)) luc va xanh de cua tre*.