Perhaps you should try some spelling variations:
hanh diem » hanh dieu, thanh liem, chanh niem
qua cham » qua hai, qua cac, va cham
diem cua » dieu cua, dien cua, diem ca
luoc can » luc canh, hoc can, luoc dai
luoc van » luoc va, luc van, luot van
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cach tu » cach thuc
cua tre » cua te, cuu tre, cua triet

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) or (cach tu)) nang xa hoi. hieu qua cham ((luoc van) OR (luoc can)) hanh diem cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (cach tu)) nang xa hoi. hieu qua cham ((luoc van) OR (luoc can)) hanh diem cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (cach tu)) nang xa hoi. hieu qua cham ((luoc van) OR (luoc can)) hanh diem cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (cach tu)) nang xa hoi. hieu qua cham ((luoc van) OR (luoc can)) hanh diem cua tre*.