Perhaps you should try some spelling variations:
thien van » thi van
cua triet » cua viet, su triet, va triet
hanh lai » hanh lam, hanh tai, thanh lap
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
lang xa » dang xay, lang van
lang ha » long ha
van cau » van dau, van hau, van chat
va hanh » van hanh, va thanh, va danh
lai cua » dai cua, hai cua, lai chau
cau tu » dau tu, cau truc

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 ty ((lang xa) OR (lang ha)) hoi. thien van cau tu va hanh lai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((lang xa) OR (lang ha)) hoi. thien van cau tu va hanh lai cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((lang xa) OR (lang ha)) hoi. thien van cau tu va hanh lai cua triet*.