Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
chat luc » chat xuc, chat lua, nhan luc
sach ty » sach tu, sach thu, xach tay
ve chat » va chat, van chat
hieu ve » hieu va, hieu van
luc va » duc va, tuc va, loc va
nang o » nang co, nang ho, nang ro
cua te » cua tu
o hoi » co hoi, o hoc, o hai

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 ty) OR (sach y)) nang o hoi. hieu ve chat luc va ((hanh vi) or (thanh tai)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach y)) nang o hoi. hieu ve chat luc va ((hanh vi) OR (thanh tai)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) OR (sach y)) nang o hoi. hieu ve chat luc va ((hanh vi) or (thanh tai)) cua te".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) OR (sach y)) nang o hoi. hieu ve chat luc va ((hanh vi) or (thanh tai)) cua te*.