Perhaps you should try some spelling variations:
thien van » thi van
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
van cau » van dau, van hau, van chat
cau tuc » cau truc, cau tu, cau luc
va danh » va dinh, va hanh, dia danh
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 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 dan)) di su triet*.