Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
chat luc » chat xuc, chat lua, nhan luc
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ve chat » va chat, van chat
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ty hang
co hoi » co hoc, co loi
luc va » duc va, tuc va, loc va
cua te » cua tu
o hoi » o hoc, o hai, 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 ty nang ((o hoi) OR (co 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 nang ((o hoi) OR (co 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 nang ((o hoi) OR (co hoi)). hieu ve chat luc va ((hanh vi) or (thanh tai)) cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ((o hoi) OR (co hoi)). hieu ve chat luc va ((hanh vi) or (thanh tai)) cua te*.