Perhaps you should try some spelling variations:
lanh hai » manh hai, thanh hai, lang chai
banh hai » manh hai, bang hai, benh hai
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
duc van » duc va, duc tan, duc manh
cam duc » cam xuc, cao duc, pham duc
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua
tang ma » mang may, tang van
lang xa » lang ha, dang xay, lang van
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty ((lang xa) or (tang ma)) hoi. hieu va cam duc van ((banh hai) OR (lanh hai)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((lang xa) OR (tang ma)) hoi. hieu va cam duc van ((banh hai) OR (lanh hai)) cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((lang xa) or (tang ma)) hoi. hieu va cam duc van ((banh hai) OR (lanh hai)) cuu tre*".