Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
va trien » va truyen, va thiet, va tuyen
sang tao » hang tai
tp thanh » tap thanh, ta thanh, tu thanh
sach ky » sac ky, sach y, sach ty
cac tac » cac toc, cac bac, cac dac
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
tao hoi » tao khoi, tao boi, tay hoi
ky sang » ky nang, ky dang, ky tang
cac tuc » cac toc, cac tu, cac nuoc
dai va » mai va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky sang tao hoi. hieu ve ((cac tuc) or (cac tac)) tp thanh dai va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky sang tao hoi. hieu ve ((cac tuc) OR (cac tac)) tp thanh dai va trien.
• Adding a wildcard symbol may retrieve word variants: su sach ky sang tao hoi. hieu ve ((cac tuc) or (cac tac)) tp thanh dai va trien*.