Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, cau treo
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
cao suc » cao su, cao duc
va hanh » van hanh, va thanh, va danh
ca tren » cu tren, la tren, co tren
ve cao » va cao, ve bao, ve cac
suc va » duc va, tuc va, luc va
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu ve cao suc va hanh vi ((cau tren) OR (ca tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang x hoi. hieu ve cao suc va hanh vi ((cau tren) OR (ca tren))".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang x hoi. hieu ve cao suc va hanh vi ((cau tren) OR (ca tren))*.