Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
van hanh » van thanh, ban hanh, van anh
vu cham » va cham, vu kham, tu cham
hai cua » thai cua, dai cua, hoi cua
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach ty, sach kem
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, va cam

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 ky) OR (sach y)) nang ma hoi. hieu ((ve cam) or (vu cham)) xuc van hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) nang ma hoi. hieu ((ve cam) OR (vu cham)) xuc van hanh hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach y)) nang ma hoi. hieu ((ve cam) or (vu cham)) xuc van hanh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sach y)) nang ma hoi. hieu ((ve cam) or (vu cham)) xuc van hanh hai cua tre*.