Perhaps you should try some spelling variations:
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
tinh cua » trinh cua, sinh cua, tinh chat
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
mang xa » lang xa, mang may, dang xay
nang ma » tang ma, sang ma, nang cao
qua cam » qua cham, qua cac, qua ca
cam tuc » cam xuc, cam tu, nam thuc
xa hanh » xa thanh, xa khanh, va hanh
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: su sach ty ((((mang xa) or (nang x))) or (nang ma)) hoi. hieu qua cam tuc xa hanh tinh cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((((mang xa) OR (nang x))) OR (nang ma)) hoi. hieu qua cam tuc xa hanh tinh cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ty ((((mang xa) or (nang x))) or (nang ma)) hoi. hieu qua cam tuc xa hanh tinh cua tre*.