Perhaps you should try some spelling variations:
sach tru » sach truc, sach thu, sach tu
tru nang » tra nang, tri nang, truc nano
hanh tai » thanh tai, hang tai, han tai
hanh vai » hanh vi, hanh va, hanh van
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
luc va » duc va, tuc va, loc va
ve cam » ve cham, ve cac, va cam

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 tru nang xa hoi. hieu ve cam ((luc va) or (tuc xa)) ((hanh vai) OR (hanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach tru nang xa hoi. hieu ve cam ((luc va) OR (tuc xa)) ((hanh vai) OR (hanh tai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach tru nang xa hoi. hieu ve cam ((luc va) or (tuc xa)) ((hanh vai) OR (hanh tai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach tru nang xa hoi. hieu ve cam ((luc va) or (tuc xa)) ((hanh vai) OR (hanh tai)) cua tre*.