Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
vat thanh » dat thanh, gat thanh, tat thanh
su triet » su tien, ve triet
tu sach » thu sach, su sach, te sach
thu vat » thuc vat, thu va, thuat vat
hieu ve » hieu va, hieu van
hoa hoi » khoa hoi, hoa hoc, hoa doi
ly hang » ly quang
ky hang » ky nang, ky dang, ty hang
su viet » so viet
ve nam » he nam, va nam, le nam

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 hang) OR (ly hang)) hoa hoi. hieu ve nam thu vat thanh vai ((su triet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky hang) OR (ly hang)) hoa hoi. hieu ve nam thu vat thanh vai ((su triet) OR (su viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky hang) OR (ly hang)) hoa hoi. hieu ve nam thu vat thanh vai ((su triet) or (su viet))*".