Perhaps you should try some spelling variations:
hanh sua » hinh su, hanh va, hanh tu
te sach » toc sach
va hanh » van hanh, va thanh, va danh
ve chat » va chat, van chat
sach ty » sach y, sach tu, sach thu
ve cham » va cham, vu cham, ve chim
cao hoc » co hoc, cho hoc, chat hoc
cao hoi » cau hoi, co hoi, tao hoi
ty nang » ky nang, ty xang, ty hang
chua te » cua te, chua tu, chua xe
loc va » hoc 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: te sach ty nang ((cao hoi) OR (cao hoc)). hieu ((ve cham) or (ve chat)) loc va hanh sua chua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ((cao hoi) OR (cao hoc)). hieu ((ve cham) OR (ve chat)) loc va hanh sua chua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ((cao hoi) OR (cao hoc)). hieu ((ve cham) or (ve chat)) loc va hanh sua chua te".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ((cao hoi) OR (cao hoc)). hieu ((ve cham) or (ve chat)) loc va hanh sua chua te*.