Perhaps you should try some spelling variations:
chat luc » chat xuc, chat lua, nhan luc
tinh hai » tinh thai, tinh chat, trinh han
su sach » so sach, vu sach
ty dang » ty xang, ty hang, ty dong
ky dang » ky nang, ky danh
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
luc may » truc may, phuc may
hai cuc » tai cuc, hai cua, thai cua
cuc tre » duc tre, cua tre, cuu tre

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 ((ty dang) or (ky dang)) cau hoi. hieu ve chat luc may tinh hai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty dang) OR (ky dang)) cau hoi. hieu ve chat luc may tinh hai cuc tre.
• Adding a wildcard symbol may retrieve word variants: su sach ((ty dang) or (ky dang)) cau hoi. hieu ve chat luc may tinh hai cuc tre*.