Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
minh hai » minh khai, tinh hai, manh hai
ty nang » ky nang, ty hang, ly nang
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
chat le » nhat le, hat le, chat lien
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, me hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((ty nang) or (ty xang)) ((ma hoi) or (ma hoa)). hieu ve chat le van minh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ty nang) OR (ty xang)) ((ma hoi) OR (ma hoa)). hieu ve chat le van minh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ((ty nang) or (ty xang)) ((ma hoi) or (ma hoa)). hieu ve chat le van minh hai cua tre*.