Perhaps you should try some spelling variations:
trinh vat » trinh van, trinh luat, sinh vat
pham duy » pham duc
cham duc » pham duc, cham soc, phan duc
tinh va » tich va, trinh van, tinh gia
so sach » so sanh, bo sach, co sach
sach tu » sach thu, cach tu, sach ty
hieu vu » hieu va, hieu ve, hieu su
dong xa » dong xay, duong xa, dong ha
chua te » cua te, chua tu, chua xe

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 tu dong xa hoi. hieu vu ((cham duc) or (pham duy)) va ((tinh va) OR (trinh vat)) chua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach tu dong xa hoi. hieu vu ((cham duc) OR (pham duy)) va ((tinh va) OR (trinh vat)) chua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach tu dong xa hoi. hieu vu ((cham duc) or (pham duy)) va ((tinh va) OR (trinh vat)) chua te".
• Adding a wildcard symbol may retrieve word variants: so sach tu dong xa hoi. hieu vu ((cham duc) or (pham duy)) va ((tinh va) OR (trinh vat)) chua te*.