Perhaps you should try some spelling variations:
va thanh » ban thanh, va tinh, le thanh
tu sach » thu sach, su sach, te sach
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, dang xay, lang van
y lang » o lang, _ lang, tay lang
ve cau » ke cau, va cau, le cau
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y lang xa hoi. hieu ((ve cau) OR (ve cac)) luc ((va thanh) or (gia thanh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y lang xa hoi. hieu ((ve cau) OR (ve cac)) luc ((va thanh) OR (gia thanh)) vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y lang xa hoi. hieu ((ve cau) OR (ve cac)) luc ((va thanh) or (gia thanh)) vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y lang xa hoi. hieu ((ve cau) OR (ve cac)) luc ((va thanh) or (gia thanh)) vai cua tre*.