Perhaps you should try some spelling variations:
thien van » thi van
thu sach » tu sach, thuat sach, thuoc sach
tay lang » tai lang, tay tang, tay quang
hanh lai » hanh lam, hanh tai, thanh lap
su triet » su viet, su tien, ve triet
ty lang » ty xang, ty hang, tu lang
van cau » van dau, van hau, van chat
xa hanh » xa thanh, xa khanh, va hanh
cau tu » dau tu, cau truc
tu xa » tu xay, tu va, te xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((ty lang) OR (tay lang)) xa hoi. thien van cau tu xa hanh lai su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ty lang) OR (tay lang)) xa hoi. thien van cau tu xa hanh lai su triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ty lang) OR (tay lang)) xa hoi. thien van cau tu xa hanh lai su triet*.