Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
ban thanh » ban hanh
ban hang » ngan hang
tu sach » thu sach, su sach, te sach
cua tre » cua te, cuu tre, cua triet
cau luc » cau truc, cau phuc
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
co cua » con cua, ca cua, cong cua
ve cau » ke cau, va cau, ve cac

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 ve cau luc ((ban thanh) OR (ban hang)) co cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat sach)) ky nang xa hoi. hieu ve cau luc ((ban thanh) OR (ban hang)) co cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thuat sach)) ky nang xa hoi. hieu ve cau luc ((ban thanh) OR (ban hang)) co cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat sach)) ky nang xa hoi. hieu ve cau luc ((ban thanh) OR (ban hang)) co cua tre*.