Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
viec ban » viec lam, viec va, viec tai
hanh hai » thanh hai, nhanh hai, hang hai
tuoc va » thuoc va, duoc va, tuc va
duoc ma » duoc lam
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky nang x ho. hieu viec ban ((((tuoc va) OR (nuoc va))) or (duoc ma)) hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang x ho. hieu viec ban ((((tuoc va) OR (nuoc va))) OR (duoc ma)) hanh hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang x ho. hieu viec ban ((((tuoc va) OR (nuoc va))) or (duoc ma)) hanh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang x ho. hieu viec ban ((((tuoc va) OR (nuoc va))) or (duoc ma)) hanh hai cua tre*.