Perhaps you should try some spelling variations:
trinh vat » trinh van, trinh luat, trinh han
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
hieu ve » hieu va, hieu van
co viet » so viet, o viet, hoc viet
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va

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

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