Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
doc sach » toc sach, nuoc sach, dac sac
chat duc » chat xuc, chat doc, chet duoc
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
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: ((((toc san) or (hoc sach))) or (doc sach)) cam nang xa hoi. hieu va chat duc va hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((toc san) OR (hoc sach))) OR (doc sach)) cam nang xa hoi. hieu va chat duc va hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((((toc san) or (hoc sach))) or (doc sach)) cam nang xa hoi. hieu va chat duc va hanh di cua tre*.