Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
thu sach » tu sach, thuat sach, thuoc sach
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
chat hat » chat thai, chat nhay, thuat hat
va chat » van chat, va phat, cao chat
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
ca tren » cau tren, cu tren, la tren
vi ca » vit ca, li ca, va ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (nuoc sach)) ty nang xa hoi. hieu va chat hat ((van hanh) or (ban hanh)) vi ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (nuoc sach)) ty nang xa hoi. hieu va chat hat ((van hanh) OR (ban hanh)) vi ca tren.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (nuoc sach)) ty nang xa hoi. hieu va chat hat ((van hanh) or (ban hanh)) vi ca tren*.