Perhaps you should try some spelling variations:
van nhanh » van thanh, van hanh, van khanh
thai cuu » thai cua, tai cuc, thai xu
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
thi cuc » tai cuc
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
tu nang » tru nang, tu nong, tu nano
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
o hai » co hai, so hai, o lai
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 tu nang ((o hoi) or (o hai)). hieu ve cac xuc van nhanh ((thai cuu) OR (thi cuc)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu nang ((o hoi) OR (o hai)). hieu ve cac xuc van nhanh ((thai cuu) OR (thi cuc)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu nang ((o hoi) or (o hai)). hieu ve cac xuc van nhanh ((thai cuu) OR (thi cuc)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sach tu nang ((o hoi) or (o hai)). hieu ve cac xuc van nhanh ((thai cuu) OR (thi cuc)) tre*.