Perhaps you should try some spelling variations:
cuu thuc » cuu tac
vat hanh » vat thanh, van hanh, va hanh
su sach » so sach, vu sach
qua cuu » qua cua, qua cu, cua cuu
hanh va » hang va, hanh vi
cu tren » tu tren, dua tren
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho
va cu » va cau, va chu, va su

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 y nang x hoi. hieu qua cuu thuc vat hanh va cu tren~.
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. hieu qua cuu thuc vat hanh va cu tren*.