Perhaps you should try some spelling variations:
sach tien » sach tren, sach thieu
tien nang » thien nang, trien nang, tin nang
thanh vi » hanh vi, thanh ve, nhanh vi
hieu van » hieu va, thien van, lieu va
thanh va » thanh van, hanh va, thanh ha
cua tre » cua te, cua triet, dua tren
tu sach » thu sach, su sach, te sach
van cam » van nam, van lam, van cau
nang xa » nang x, lang xa, nang ma
cuu tre » cau tren, cau treo
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach tien nang xa hoi. hieu van cam xuc va ((thanh vi) OR (thanh va)) ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tien nang xa hoi. hieu van cam xuc va ((thanh vi) OR (thanh va)) ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tien nang xa hoi. hieu van cam xuc va ((thanh vi) OR (thanh va)) ((cua tre) or (cuu tre))*".