Perhaps you should try some spelling variations:
trinh viet » trinh vat
ninh viet » sinh vien, anh viet
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
va cam » va cham, va cac, va cao
cua te » cua tu

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 va cam xuc van ((trinh viet) OR (ninh viet)) cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty xang xa hoi. hieu va cam xuc van ((trinh viet) OR (ninh viet)) cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ty xang xa hoi. hieu va cam xuc van ((trinh viet) OR (ninh viet)) cua te*.