Perhaps you should try some spelling variations:
khanh thi » nhanh thi, khanh thu, nhanh thai
van khanh » van thanh, van hanh, van anh
hieu ve » hieu va, hieu van
thi cuc » tai cuc
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
tu sach » thu sach, su sach, te sach
cuc tre » duc tre, cua tre, cuu tre
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac
o lai » o lao
o hai » co hai, so hai, _ hai
o hoi » co hoi, o hoc, o hoa

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 y nang ((o hoi) or (((o hai) OR (o lai)))). hieu ve cac xuc van khanh thi cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ((o hoi) OR (((o hai) OR (o lai)))). hieu ve cac xuc van khanh thi cuc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ((o hoi) or (((o hai) OR (o lai)))). hieu ve cac xuc van khanh thi cuc tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((o hoi) or (((o hai) OR (o lai)))). hieu ve cac xuc van khanh thi cuc tre*.