Perhaps you should try some spelling variations:
sach thi » sach thu, sach tai, sach thieu
thi nang » thi cong, ki nang, thi hanh
hanh tai » thanh tai, hang tai, han tai
hanh vai » hanh vi, hanh va, hanh van
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va
cuu tre » cua 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 thi nang xa hoi. ((hieu ve) or (hieu van)) cam xuc va ((hanh vai) OR (hanh tai)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thi nang xa hoi. ((hieu ve) OR (hieu van)) cam xuc va ((hanh vai) OR (hanh tai)) cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thi nang xa hoi. ((hieu ve) or (hieu van)) cam xuc va ((hanh vai) OR (hanh tai)) cuu tre*".