Perhaps you should try some spelling variations:
khai luoc » hai huoc, hai luom, dai luoc
hanh diem » hanh dieu, thanh liem, chanh niem
diem cua » dieu cua, dien cua, diem ca
van hanh » van thanh, ban hanh, van anh
luoc van » luoc can, luoc va, luc van
va khai » van khai, va khao, va kha
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
cach tu » cach thuc

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) OR (nang ma)) hoi. hieu va khai luoc van 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) OR (nang ma)) hoi. hieu va khai luoc van 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) OR (nang ma)) hoi. hieu va khai luoc van hanh diem cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (cach tu)) ((nang xa) OR (nang ma)) hoi. hieu va khai luoc van hanh diem cua tre*.