Perhaps you should try some spelling variations:
sach tham » sach nha
trinh vi » trinh va, trinh ve, trinh viet
trong xa » trong xay, trong ca, trong xu
vu sach » vu bach, su sach, vu khach
tinh vi » tinh voi, tinh va, dinh vi
cua tre » cua te, cuu tre, cua triet
cac tuc » cac toc, cac tu, cac tac
hieu ve » hieu va, hieu van
tang ma » mang may, tang van
tuc va » thuc va, truc va, tuc xa
ve cac » va cac, vien cac

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 tham ((tang ma) or (trong xa)) hoi. hieu ve cac tuc va ((tinh vi) or (trinh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach tham ((tang ma) OR (trong xa)) hoi. hieu ve cac tuc va ((tinh vi) OR (trinh vi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sach tham ((tang ma) or (trong xa)) hoi. hieu ve cac tuc va ((tinh vi) or (trinh vi)) cua tre*.