Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
hanh ca » hanh cac, hanh cat, hanh cua
va hanh » van hanh, va thanh, va danh
cac thu » cach thuc, cac thoi
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va
sach v » sach va, sach y, sach 2
thu va » thuc va, thue va, tu va
v nang » va nang, vu nang, van nang
ca cuu » cap cuu, cua cuu, ca cua

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 v nang ((le hoi) or (ma hoa)). ((hieu va) or (hieu qua)) cac thu va hanh ca cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach v nang ((le hoi) OR (ma hoa)). ((hieu va) OR (hieu qua)) cac thu va hanh ca cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach v nang ((le hoi) or (ma hoa)). ((hieu va) or (hieu qua)) cac thu va hanh ca cuu tre*.