Perhaps you should try some spelling variations:
dang xay » dang van, van xay
su sach » so sach, vu sach
cam tuc » cam xuc, cam tu, nam thuc
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
cuu tre » cua tre, cau tren, cau treo
va cam » va cham, va cac, va cao
dan va » doan va, ban va, han va

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 ty ((nang xa) or (dang xay)) hoi. hieu va cam tuc xa ((dan va) OR (dan ca)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((nang xa) OR (dang xay)) hoi. hieu va cam tuc xa ((dan va) OR (dan ca)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((nang xa) or (dang xay)) hoi. hieu va cam tuc xa ((dan va) OR (dan ca)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: su sach ty ((nang xa) or (dang xay)) hoi. hieu va cam tuc xa ((dan va) OR (dan ca)) cuu tre*.