Perhaps you should try some spelling variations:
chieu chien » thien chien, hieu hien
chien hach » thien hach, chien dich, hien hanh
huu them » huu thu, huu thuc, huu liem
thanh va » thanh van, thanh ha, thanh ve
hach luc » thach duc, mach lac, sach luu
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hanh va » hang va, hanh vi
cuu tre » cua tre, cau tren, cau treo
tu sach » thu sach, su sach, te sach
luc va » duc va, tuc va, loc va
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: tu sach ty nang x hoi. chieu chien hach luc va ((thanh va) or (hanh va)) ((cuu tre) or (huu them))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. chieu chien hach luc va ((thanh va) OR (hanh va)) ((cuu tre) OR (huu them)).
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. chieu chien hach luc va ((thanh va) or (hanh va)) ((cuu tre) or (huu them))*.