Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
toc sac » toc sach, toc san, hoc sach
hai cua » thai cua, dai cua, hoi cua
truc va » thuc va, thuc vat, trung va
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
sac ky » cac ky, sai ky
xuc va » duc va, tuc va, luc va
ma hoi » mai hoi, xa hoi, me hoi
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: toc sac ky nang ((ma hoi) or (ma hoa)). hieu ve cam ((xuc va) or (truc va)) hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky nang ((ma hoi) OR (ma hoa)). hieu ve cam ((xuc va) OR (truc va)) hanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sac ky nang ((ma hoi) or (ma hoa)). hieu ve cam ((xuc va) or (truc va)) hanh hai cua tre*.