Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
lang xa » lang ha, dang xay, lang van
thi van » thi lan, thi hanh, thi nang
nam xuc » cam xuc, nam thuc, nam duoc
nam xua » nam cua, nam mua, nam qua
cua tre » cua te, cuu tre, cua triet
sach o » sach lo, sac o, sach y
o lang » hoa lang, hoi lang
vi cua » vai cua, di 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 o lang xa hoi. thi van ((nam xuc) OR (nam xua)) van hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach o lang xa hoi. thi van ((nam xuc) OR (nam xua)) van hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach o lang xa hoi. thi van ((nam xuc) OR (nam xua)) van hanh vi cua tre*.