Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
thai cua » than cua, tai cuc, tri cua
hang tai » hang va
va thanh » gia thanh, ban thanh, va tinh
cua tre » cua te, cuu tre, cua triet
va hanh » van hanh, va danh, ban hanh
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
can ky » van ky, dan ky, ban ky
su can » su van, su cao, tu can

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su can ky ((hang tai) OR (dung tai)) roi. hieu ve cham luc ((va hanh) OR (va thanh)) thai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su can ky ((hang tai) or (dung tai)) roi. hieu ve cham luc ((va hanh) OR (va thanh)) thai cua tre~".
• Adding a wildcard symbol may retrieve word variants: su can ky ((hang tai) or (dung tai)) roi. hieu ve cham luc ((va hanh) OR (va thanh)) thai cua tre*.