Perhaps you should try some spelling variations:
dang xay » dang van, van xay
su triet » su viet, su tien, ve triet
te sach » toc sach
dau sai » dau hai, dau tai, danh sai
cua tuc » cua duc, cua tu, cua thuoc
sach ky » sac ky, sach y, sach ty
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
va cam » va cham, va cao, va cai
va dau » va dao

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 ky dang xay hoi. hieu ((va cam) OR (va cac)) duc va dau sai ((su triet) or (cua tuc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang xay hoi. hieu ((va cam) OR (va cac)) duc va dau sai ((su triet) OR (cua tuc))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky dang xay hoi. hieu ((va cam) OR (va cac)) duc va dau sai ((su triet) or (cua tuc))*".