Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
hieu va » lieu va
va hanh » van hanh, va thanh, va danh
hanh co » anh co, danh co, hanh mo
cua tre » cua te, cuu tre, cua triet
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
cac tu » cac thu, cach tu, cac du
co cua » con cua, ca cua, cong 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 tu va hanh co cua 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 tu va hanh co cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach v nang ((le hoi) or (ma hoa)). ((hieu va) or (hieu qua)) cac tu va hanh co cua tre*.