Perhaps you should try some spelling variations:
thanh ha » thanh hoa, thanh hai, nhanh ha
vu khach » vu khanh, vu khac, vay khach
vu sach » vu bach, su sach
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
luc va » duc va, tuc va
loc va » hoc va
ha cua » hoa cua, hai cua, nha cua
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: ((vu sach) OR (vu khach)) ky lang xa hoi. hieu ve cac ((luc va) or (loc va)) thanh ha cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu khach)) ky lang xa hoi. hieu ve cac ((luc va) OR (loc va)) thanh ha cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (vu khach)) ky lang xa hoi. hieu ve cac ((luc va) or (loc va)) thanh ha cua tre".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (vu khach)) ky lang xa hoi. hieu ve cac ((luc va) or (loc va)) thanh ha cua tre*.