Perhaps you should try some spelling variations:
hien hanh » dieu hanh
thanh van » thanh san, thanh toan, thanh phan
hieu hien » bieu hien, dieu hien, chieu chien
va thanh » gia thanh, ban thanh, va tinh
hanh luc » hanh phuc, hanh luat, thanh luu
tu sach » thu sach, te sach, vu sach
van cuu » van cau, van chu, van cu
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
su sach » so sach, vu sach
tu cach » tu cac
cuu tre » cua tre, cau tren, cau treo
luc va » duc va, tuc va, loc va

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) OR (tu cach))) or (su sach)) ky tang xa hoi. hieu hien hanh luc va thanh van cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (tu cach))) OR (su sach)) ky tang xa hoi. hieu hien hanh luc va thanh van cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((tu sach) OR (tu cach))) or (su sach)) ky tang xa hoi. hieu hien hanh luc va thanh van cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) OR (tu cach))) or (su sach)) ky tang xa hoi. hieu hien hanh luc va thanh van cuu tre*.