Perhaps you should try some spelling variations:
nhanh hai » nhanh thai, thanh hai, nhanh ha
hanh hai » thanh hai, hang hai, hanh tai
nang dau » hang dau, xang dau, nang du
su sach » so sach, vu sach
cua tre » cuu tre, cua triet, dua tren
sach ky » sac ky, sach y, sach ty
cam tuc » cam xuc, cam tu, nam thuc
hieu ve » hieu va, hieu van
dau hoi » cau hoi, dai hoi, dan hoi
tuc va » thuc va, truc va, tuc xa
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 sach ky nang dau hoi. hieu ve cam tuc 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 sach ky nang dau hoi. hieu ve cam tuc va ((hanh hai) OR (nhanh hai)) ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: su sach ky nang dau hoi. hieu ve cam tuc va ((hanh hai) or (nhanh hai)) ((cua tre) or (cua te))*.