Perhaps you should try some spelling variations:
ban hang » ngan hang
cau tren » cu tren, dau tren, ca tren
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
qua cam » qua cham, qua cac, qua ca
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky nang xa hoi. hieu qua cam xuc ((va hanh) or (ban hang)) dinh ((cuu tre) OR (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang xa hoi. hieu qua cam xuc ((va hanh) OR (ban hang)) dinh ((cuu tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang xa hoi. hieu qua cam xuc ((va hanh) or (ban hang)) dinh ((cuu tre) OR (cau tren))".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang xa hoi. hieu qua cam xuc ((va hanh) or (ban hang)) dinh ((cuu tre) OR (cau tren))*.