Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
va trien » va truyen, va thiet, va tuyen
sach thu » sach thue, sach thieu, sach tham
su triet » su viet, su tien, ve triet
ha thanh » va thanh, pham thanh, phan thanh
co sach » bo sach, cuon sach, hoc sach
hieu ve » hieu va, hieu van
sang ma » tang ma, sang tao, mang may
nang ma » tang ma, nang cao, mang may
cac tu » cac thu, cach tu, cac du
ve cac » va cac, vien cac
tu ha » tu hat, tu va, vu ha

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 ((nang ma) or (sang ma)) hoa. hieu ve cac tu ha thanh lai ((su triet) or (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach thu ((nang ma) OR (sang ma)) hoa. hieu ve cac tu ha thanh lai ((su triet) OR (va trien)).
• Adding a wildcard symbol may retrieve word variants: co sach thu ((nang ma) or (sang ma)) hoa. hieu ve cac tu ha thanh lai ((su triet) or (va trien))*.