Perhaps you should try some spelling variations:
sach thi » sach thu, sach tai, sach thieu
thi cong » tai cong, thien cong
te sach » toc sach
hanh di » hanh de, hang di, danh di
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
cong xa » cong xay, cong xua, cong ha
xuc va » duc va, tuc va, xac va
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach thi cong xa hoi. hieu va cam ((xuc va) or (luc va)) ((hanh di) or (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thi cong xa hoi. hieu va cam ((xuc va) OR (luc va)) ((hanh di) OR (hanh vi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach thi cong xa hoi. hieu va cam ((xuc va) or (luc va)) ((hanh di) or (hanh vi)) cua tre*.