Perhaps you should try some spelling variations:
khien bach » vien bach, khien bang, thien hach
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
cuu tre » cua tre, cau tren, cau treo
va cuu » va cau, va chu, va huu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky ((lang xa) or (nang x)) hoi. dieu khien bach ((xuc van) OR (duc van)) hang va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((lang xa) OR (nang x)) hoi. dieu khien bach ((xuc van) OR (duc van)) hang va cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((lang xa) or (nang x)) hoi. dieu khien bach ((xuc van) OR (duc van)) hang va cuu tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((lang xa) or (nang x)) hoi. dieu khien bach ((xuc van) OR (duc van)) hang va cuu tre*.