Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
tp thanh » tap thanh, ta thanh, tu thanh
sang tai » hang tai, sang tao, tang tai
va triet » va trien, ve triet, cua triet
nam thuc » nam thuoc, am thuc, nam thu
su sach » so sach, vu sach
thuc tp » thuc tap, thuc te, thuc tu
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
tai hoi » tai khoi, dai hoi, tai hai
ky sang » ky nang, ky dang, ky tang
su tien » su kien, su hien, tu tieng
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: su sach ky sang tai hoi. hieu ve nam thuc tp thanh dai ((((va triet) or (va thiet))) or (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky sang tai hoi. hieu ve nam thuc tp thanh dai ((((va triet) OR (va thiet))) OR (su tien)).
• Adding a wildcard symbol may retrieve word variants: su sach ky sang tai hoi. hieu ve nam thuc tp thanh dai ((((va triet) or (va thiet))) or (su tien))*.