Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
thanh va » thanh van, hanh va, thanh ha
cau tren » cu tren, dau tren, ca tren
su sach » so sach, vu sach
van cam » van nam, van lam, van cau
xuc ban » duc ban, cuc ban, quoc ban
va cau » van cau, va cac, va dau
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) or (thuat sach)) ky nang x hoi. hieu van cam xuc ban thanh va cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thuat sach)) ky nang x hoi. hieu van cam xuc ban thanh va cau tren.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thuat sach)) ky nang x hoi. hieu van cam xuc ban thanh va cau tren*.