Perhaps you should try some spelling variations:
sach ky » sac ky, sach ty, sach kem
tinh vi » trinh vi, tinh voi, tinh va
va tinh » may tinh
lam tuc » lam thuoc, lam truoc, luat tuc
qua lam » cua lam, qua la, qua lao
cua tre » cua te, cuu tre, cua triet
nang xa » lang xa, nang ma, mang xa
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) or (sach y)) ((nang xa) or (nang x)) hoi. hieu qua lam tuc va tinh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) ((nang xa) OR (nang x)) hoi. hieu qua lam tuc va tinh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach y)) ((nang xa) or (nang x)) hoi. hieu qua lam tuc va tinh vi cua tre*.