Perhaps you should try some spelling variations:
chat luc » chat xuc, chat lua, nhan luc
hieu cac » hieu luc, hieu va, hieu van
hieu cao » chieu cao, hieu ca, kieu cao
su sach » so sach, vu sach
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
yu hang » yu zhang, yu pang, yu wang
co hoi » co hoc, co loi
y hang » ly hang, ty hang, _ hang
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua

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 ((y hang) OR (yu hang)) co hoi. ((hieu cao) OR (hieu cac)) chat luc va hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y hang) OR (yu hang)) co hoi. ((hieu cao) OR (hieu cac)) chat luc va hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((y hang) OR (yu hang)) co hoi. ((hieu cao) OR (hieu cac)) chat luc va hanh vi cua tre*.