Perhaps you should try some spelling variations:
thanh di » thanh doi, thanh de, thanh do
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
di cua » dai cua, doi cua, de cua
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: vu sach ky ((nang xa) or (lang xa)) hoi. hieu va cam ((xuc va) OR (luc va)) thanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky ((nang xa) OR (lang xa)) hoi. hieu va cam ((xuc va) OR (luc va)) thanh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky ((nang xa) or (lang xa)) hoi. hieu va cam ((xuc va) OR (luc va)) thanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sach ky ((nang xa) or (lang xa)) hoi. hieu va cam ((xuc va) OR (luc va)) thanh di cua tre*.