Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, chat lua
hanh hai » thanh hai, nhanh hai, hang hai
cham cuu » cap cuu, chat cua
su sach » vu sach
hai cua » thai cua, dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
xac hoi » xa hoi, cac thoi, cac khoi
dan xac » dan bac, dan cac, dan xa
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet

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 (so sach)) hoa dan xac hoi. hieu ve ((cham luc) or (cham cuu)) va hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) hoa dan xac hoi. hieu ve ((cham luc) OR (cham cuu)) va hanh hai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) hoa dan xac hoi. hieu ve ((cham luc) or (cham cuu)) va hanh hai cua tre*".