Perhaps you should try some spelling variations:
phap thuc » phap thu, phap hoc, phap tu
sach ky » sach y, sach kem, sach hay
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
va phap » va phat, ban phap
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
kem cua » em cua, keo cua, diem cua
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky

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 ky) or (sach ty))) or (sac ky)) nang xa hoi. lieu va phap thuc va hanh kem cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((((sach ky) OR (sach ty))) OR (sac ky)) nang xa hoi. lieu va phap thuc va hanh kem cua tre.
• Adding a wildcard symbol may retrieve word variants: su ((((sach ky) or (sach ty))) or (sac ky)) nang xa hoi. lieu va phap thuc va hanh kem cua tre*.