Perhaps you should try some spelling variations:
thien van » thi van
su triet » su viet, su tien, ve triet
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, ban hanh
tu sach » thu sach, su sach, te sach
cau tuc » cau truc, cau tu, cau luc
van cau » van dau, van hau, van chat
va danh » va dinh, dia danh, va thanh
va dan » ca dan, va dao, va dau
x hoi » xa hoi, o hoi, x ho
di su » doi su, ki su, da su

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 ky nang x hoi. thien van cau tuc ((((va danh) OR (va hanh))) or (va dan)) di su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. thien van cau tuc ((((va danh) OR (va hanh))) OR (va dan)) di su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. thien van cau tuc ((((va danh) OR (va hanh))) or (va dan)) di su triet*".