Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
van thang » van thanh, van khang, van hang
ban hang » ngan hang
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren, cau treo
va cam » va cham, va cac, va cao
va cuu » va cau, va chu, va huu

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) or (thuat sach)) ky nang xa hoi. hieu va cam xuc ((ban hang) or (van thang)) va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat sach)) ky nang xa hoi. hieu va cam xuc ((ban hang) OR (van thang)) va cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat sach)) ky nang xa hoi. hieu va cam xuc ((ban hang) or (van thang)) va cuu tre*.