Perhaps you should try some spelling variations:
thanh gian » thanh giang, thach giang, thanh san
ban thanh » ban hanh, ban hang
va trien » va truyen, va thiet, va tuyen
thuc ban » thuoc ban, thuc dan, thu ban
nam thuc » nam thuoc, am thuc, nam thu
sach ty » sach y, sach thu, xach tay
gian va » gian van, gian ve, gian ha
hieu ve » hieu va, hieu van
sang ma » tang ma, nang ma, sang tao
lang xa » lang ha, dang xay, lang van
sach tu » sach thu, cach tu, sach uu
ve nam » he nam, va nam, le nam

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) or (sach tu)) ((lang xa) or (sang ma)) hoi. hieu ve nam thuc ban thanh gian va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach tu)) ((lang xa) OR (sang ma)) hoi. hieu ve nam thuc ban thanh gian va trien.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach tu)) ((lang xa) or (sang ma)) hoi. hieu ve nam thuc ban thanh gian va trien*.