Perhaps you should try some spelling variations:
thuoc sach » nuoc sach, thuat sach, thuoc sinh
hoc sach » hoc sinh, hoc cac, hoc anh
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
qua cam » qua cham, qua cac, qua ca
cam luc » cam xuc, cau luc
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
v nang » va nang, vu nang, van nang
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) or (hoc sach)) v nang xa hoi. hieu qua cam luc ((va danh) OR (va hanh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (hoc sach)) v nang xa hoi. hieu qua cam luc ((va danh) OR (va hanh)) di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) or (hoc sach)) v nang xa hoi. hieu qua cam luc ((va danh) OR (va hanh)) di cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (hoc sach)) v nang xa hoi. hieu qua cam luc ((va danh) OR (va hanh)) di cua tre*.