Perhaps you should try some spelling variations:
tinh vang » tinh sang, tinh bang, tinh lang
thu sach » tu sach, thuat sach, thuoc sach
vang cua » mang cua, hang cua, tang cua
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, dang xay, lang van
ly lang » ly hang, ly vang, le lang
su sach » so sach, vu sach
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
va cam » va cham, va cac, va cao

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) or (su sach)) ly lang xa hoi. hieu va cam ((xuc va) OR (luc va)) tinh vang cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (su sach)) ly lang xa hoi. hieu va cam ((xuc va) OR (luc va)) tinh vang cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (su sach)) ly lang xa hoi. hieu va cam ((xuc va) OR (luc va)) tinh vang cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (su sach)) ly lang xa hoi. hieu va cam ((xuc va) OR (luc va)) tinh vang cua tre*.