Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
dan hanh » dang hanh, dan khanh, dan thanh
thuc dan » thuc hanh, hoc dan, thuc vat
su sach » so sach
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
may hoi » may thoi, tay hoi, mai hoi
vu sach » vu bach, vu khach
ve cam » ve cham, ve cac, va cam
va cao » va cac, va co, va dao
y mang » cay mang

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) or (vu sach)) y mang may hoi. hieu ((ve cam) or (va cao)) thuc dan hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) y mang may hoi. hieu ((ve cam) OR (va cao)) thuc dan hanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) y mang may hoi. hieu ((ve cam) or (va cao)) thuc dan hanh hai cua tre*.