Perhaps you should try some spelling variations:
chieu chien » thien chien, hieu hien
chien hach » thien hach, chien dich, hien hanh
tu sach » thu sach, su sach, te sach
tinh va » tich va, trinh van, trinh vat
che tre » cho tre, khoe tre, choi tre
y nang » ky nang, ly nang, v nang
xuc va » duc va, tuc va, luc 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 y nang x hoi. chieu chien hach ((xuc va) or (tuc xa)) tinh va che tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang x hoi. chieu chien hach ((xuc va) OR (tuc xa)) tinh va che tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. chieu chien hach ((xuc va) or (tuc xa)) tinh va che tre*.