Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
linh hai » tinh hai, lanh hai, minh hai
ban linh » ban tinh, van linh, tran linh
cau tren » cu tren, dau tren, ca tren
lang van » dang van, tang van, hoang van
qua cac » cua cac
sach ty » sach y, sach tu, sach thu
xuc ban » duc ban, cuc ban, quoc ban
cuu tre » cua tre, cau treo
cac xuc » cam xuc, cac nuoc, chat xuc

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 ty ((nang x) or (lang van)) hoi. hieu qua cac xuc ban linh hai ((cuu tre) OR (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty ((nang x) OR (lang van)) hoi. hieu qua cac xuc ban linh hai ((cuu tre) OR (cau tren))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty ((nang x) or (lang van)) hoi. hieu qua cac xuc ban linh hai ((cuu tre) OR (cau tren))*".