Perhaps you should try some spelling variations:
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
hang di » hang doi, hang vi, hang dien
hanh di » hanh vi, hanh de, danh di
cuu tre » cua tre, cau tren, cau treo
tuc van » thuc van, truc van, duc van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
tuc va » thuc va, truc va, tuc xa
va dau » va dao

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 hoi. lieu va dau ((tuc van) OR (tuc va)) ((hanh di) or (hang di)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. lieu va dau ((tuc van) OR (tuc va)) ((hanh di) OR (hang di)) cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. lieu va dau ((tuc van) OR (tuc va)) ((hanh di) or (hang di)) cuu tre*".