Perhaps you should try some spelling variations:
sach nuoc » sach duoc, cac nuoc, bach tuoc
dua tren » dung tren
hanh vai » hanh vi, hanh va, hanh tai
tu sach » thu sach, su sach, te sach
cuu tre » cau tren, cau treo
va hanh » van hanh, va thanh, va danh
ve sach » ve cach, te sach, vu sach
hieu ve » hieu va, hieu van
cua tre » cua te, cua triet, cua thep
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu ve sach nuoc va hanh vai ((dua tren) or (((cuu tre) or (cua tre))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach v nang x hoi. hieu ve sach nuoc va hanh vai ((dua tren) OR (((cuu tre) OR (cua tre)))).
• Adding a wildcard symbol may retrieve word variants: tu sach v nang x hoi. hieu ve sach nuoc va hanh vai ((dua tren) or (((cuu tre) or (cua tre))))*.