Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
nang hai » hang hai, nang tai, dang hai
va thanh » gia thanh, ban thanh, va tinh
va danh » va dinh, va dan, va hanh
qua cam » qua cham, qua cac, qua ca
sach ky » sac ky, sach y, sach ty
nang ha » nang han, nang hoa, lang ha
cua tre » cua te, cuu tre, cua triet
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: hoc sach ky ((nang ha) OR (nang hai)) hoi. hieu qua cam xuc ((va thanh) or (va danh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky ((nang ha) OR (nang hai)) hoi. hieu qua cam xuc ((va thanh) OR (va danh)) di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ky ((nang ha) OR (nang hai)) hoi. hieu qua cam xuc ((va thanh) or (va danh)) di cua tre".
• Adding a wildcard symbol may retrieve word variants: hoc sach ky ((nang ha) OR (nang hai)) hoi. hieu qua cam xuc ((va thanh) or (va danh)) di cua tre*.