Perhaps you should try some spelling variations:
quan thuc » luan thuc, qua thuc, quan chuc
va thanh » gia thanh, ban thanh, va tinh
cau treo » cau theo, cau tren, cau triet
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
va danh » va dinh, va dan, va hanh
va cau » van cau, va cac, va dau

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 x ho. hieu qua quan thuc ((va danh) or (va thanh)) va cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang x ho. hieu qua quan thuc ((va danh) OR (va thanh)) va cau treo.
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang x ho. hieu qua quan thuc ((va danh) or (va thanh)) va cau treo*.