Perhaps you should try some spelling variations:
nhanh hai » nhanh thai, thanh hai, nhanh ha
nang dau » hang dau, xang dau, nang du
hanh hai » thanh hai, hang hai, hanh tai
dau hoi » cau hoi, dai hoi, dan hoi
hieu ve » hieu va, hieu van
cua tre » cuu tre, cua triet, dua tren
cam luc » cam xuc, cau luc
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
luc va » duc va, tuc va, loc va
ve cam » ve cham, ve cac, va cam
cua te » cua tu

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 dau hoi. hieu ve cam luc va ((hanh hai) or (nhanh hai)) ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang dau hoi. hieu ve cam luc va ((hanh hai) OR (nhanh hai)) ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: su sac ky nang dau hoi. hieu ve cam luc va ((hanh hai) or (nhanh hai)) ((cua tre) or (cua te))*.