Perhaps you should try some spelling variations:
trinh vat » trinh van, trinh luat, sinh vat
ninh viet » sinh vien, anh viet
vu sach » vu bach, su sach, vu khach
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: vu sach ty xang xa hoi. hieu va cam xuc van ((((trinh viet) OR (trinh vat))) or (ninh viet)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty xang xa hoi. hieu va cam xuc van ((((trinh viet) OR (trinh vat))) OR (ninh viet)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ty xang xa hoi. hieu va cam xuc van ((((trinh viet) OR (trinh vat))) or (ninh viet)) cua te".
• Adding a wildcard symbol may retrieve word variants: vu sach ty xang xa hoi. hieu va cam xuc van ((((trinh viet) OR (trinh vat))) or (ninh viet)) cua te*.