Perhaps you should try some spelling variations:
van trinh » van thinh, van tinh, dan trinh
hieu van » hieu va, thien van, lieu va
van chat » cao chat
chat xuc » chat huu, cam xuc, chao xu
hoi cua » hoi chuc
doi cua » dai cua
xuc van » duc van, luc van, vuc van
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
lang xa » lang ha, dang xay, lang van

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky ((lang xa) or (nang ma)) hoi. hieu van chat xuc van trinh ((doi cua) OR (hoi cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky ((lang xa) OR (nang ma)) hoi. hieu van chat xuc van trinh ((doi cua) OR (hoi cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky ((lang xa) or (nang ma)) hoi. hieu van chat xuc van trinh ((doi cua) OR (hoi cua)) tre".
• Adding a wildcard symbol may retrieve word variants: so sach ky ((lang xa) or (nang ma)) hoi. hieu van chat xuc van trinh ((doi cua) OR (hoi cua)) tre*.