Perhaps you should try some spelling variations:
thieu thanh » thien thanh, thi thanh, thu thanh
thanh xa » thanh ha, thanh va, thanh ba
thuc day » thuc dan, thuc vat
day hanh » day nhanh, day thanh, dao hanh
hanh dao » lanh dao, thanh dat, thanh dam
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
ve nam » he nam, va nam, le nam
va nay » va ngay, va cay
dao va » dao van, tao va, do va

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 thieu thanh xa hoi. hieu ((ve nam) or (va nay)) thuc day hanh dao va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thieu thanh xa hoi. hieu ((ve nam) OR (va nay)) thuc day hanh dao va triet.
• Adding a wildcard symbol may retrieve word variants: tu sach thieu thanh xa hoi. hieu ((ve nam) or (va nay)) thuc day hanh dao va triet*.