Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
danh ca » dan ca, doanh cua, danh cho
truc va » thuc va, thuc vat, trung va
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
sach v » sach va, sach y, sach 2
tuc va » thuc va, tuc xa, duc va
me hoi » le hoi
v nang » va nang, vu nang, van nang
ca cua » co cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach v nang ((me hoi) or (ma hoa)). hieu va cac ((tuc va) OR (truc va)) danh ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach v nang ((me hoi) OR (ma hoa)). hieu va cac ((tuc va) OR (truc va)) danh ca cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach v nang ((me hoi) or (ma hoa)). hieu va cac ((tuc va) OR (truc va)) danh ca cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach v nang ((me hoi) or (ma hoa)). hieu va cac ((tuc va) OR (truc va)) danh ca cua tre*.