Perhaps you should try some spelling variations:
trinh vat » trinh van, trinh luat, sinh vat
cua viet » ca viet, hoa viet, cua vat
sach tay » xach tay, sach hay, sach nay
tay lang » tai lang, tay tang, tay quang
vat cua » mat cua, bat cua, dat cua
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
ve cham » va cham, ve chat, vu cham
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
ve cam » ve cac, va cam, ve cai

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

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