Perhaps you should try some spelling variations:
te sach » toc sach
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
cu tren » tu tren, dua tren
nang xa » lang xa, nang ma, mang xa
dam tu » cam tu, tam tu, dam thuc
nam tu » nam thu, nam thuc
di cu » di cau, di cua, di du

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 (nang x)) hoi. hieu va ((dam tu) or (nam tu)) va hanh di cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((nang xa) OR (nang x)) hoi. hieu va ((dam tu) OR (nam tu)) va hanh di cu tren.
• Adding a wildcard symbol may retrieve word variants: te sach ty ((nang xa) or (nang x)) hoi. hieu va ((dam tu) or (nam tu)) va hanh di cu tren*.