Perhaps you should try some spelling variations:
khien hanh » hien hanh, khien canh, thien thanh
trinh vat » trinh van, trinh luat, sinh vat
toc sach » hoc sach, doc sach, thuoc sach
hanh xuc » hanh xu, hanh phuc, hanh duoc
xuc may » xuc hay, truc may, phuc may
tinh va » tich va, trinh van, tinh gia
cuu tre » cua tre, cau tren, cau treo
x hoi » xa hoi, o hoi, x ho

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) OR (toc sach)) ky nang x hoi. dieu khien hanh xuc may ((tinh va) or (trinh vat)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky nang x hoi. dieu khien hanh xuc may ((tinh va) OR (trinh vat)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ky nang x hoi. dieu khien hanh xuc may ((tinh va) or (trinh vat)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ky nang x hoi. dieu khien hanh xuc may ((tinh va) or (trinh vat)) cuu tre*.