Perhaps you should try some spelling variations:
te sach » toc sach
va danh » va dinh, va dan, va hanh
nang xa » nang x, nang ma, mang xa
cua tre » cuu tre, cua triet, dua tren
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, sach thu
cac luc » cau luc, coc luc, cac nuoc
danh de » hanh de, dan de, dang de
ve cac » va cac, vien cac
luc va » duc va, tuc va, loc va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty ((nang xa) or (lang xa)) hoi. hieu ve cac luc va danh de ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((nang xa) OR (lang xa)) hoi. hieu ve cac luc va danh de ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((nang xa) or (lang xa)) hoi. hieu ve cac luc va danh de ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((nang xa) or (lang xa)) hoi. hieu ve cac luc va danh de ((cua tre) OR (cua te))*.