Perhaps you should try some spelling variations:
toan su » tan su, toan tu, toan cau
toan du » tran duc, toan cau
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
tu gia » tu giao, tu giac, tu giay
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky nang x hoi. hieu ((ve cam) OR (ve cac)) tu gia thanh ((toan su) or (toan du)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang x hoi. hieu ((ve cam) OR (ve cac)) tu gia thanh ((toan su) OR (toan du)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang x hoi. hieu ((ve cam) OR (ve cac)) tu gia thanh ((toan su) or (toan du)) triet*".