Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
ban hang » ngan hang
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
van cau » van dau, van hau, van chat
va hanh » va thanh, va danh, ban hanh
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu
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: su sach ty nang x hoi. hieu van cau truc ((((va hanh) or (ban hang))) or (van hanh)) vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang x hoi. hieu van cau truc ((((va hanh) OR (ban hang))) OR (van hanh)) vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang x hoi. hieu van cau truc ((((va hanh) or (ban hang))) or (van hanh)) vi cuu tre*.