Perhaps you should try some spelling variations:
phan duc » pham duc, phan tu, phan dau
van hanh » van thanh, ban hanh, van anh
soi viet » so viet, hoi viet, oi viet
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
ky phan » ke phan, ly phan, ky phap
duc van » duc va, duc tan, duc manh
vi soi » vi toi
x hoi » xa hoi, o hoi, x ho

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 nang x hoi. hieu ky phan duc van hanh vi soi viet~.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu ky phan duc van hanh vi soi viet*.