Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
va trien » va truyen, va thiet, va tuyen
sach thu » sach thue, sach thieu, sach tham
su triet » su viet, su tien, ve triet
sang tao » hang tai
xa thanh » va thanh, ha thanh, ta thanh
co sach » bo sach, cuon sach, hoc sach
tang ma » mang may, tang van
hieu va » lieu va, hieu qua
cac tu » cac thu, cach tu, cac du
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: co sach thu ((tang ma) or (sang tao)) hoa. hieu va cac tu xa thanh lap ((su triet) or (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach thu ((tang ma) OR (sang tao)) hoa. hieu va cac tu xa thanh lap ((su triet) OR (va trien)).
• Adding a wildcard symbol may retrieve word variants: co sach thu ((tang ma) or (sang tao)) hoa. hieu va cac tu xa thanh lap ((su triet) or (va trien))*.