Perhaps you should try some spelling variations:
su sach » so sach, vu sach
va cham » va chat, va tham
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
di cua » dai cua, doi cua, de cua
cua tu » cua tuc, cua su, cua cu
ve cac » va cac, vien cac
_ lang » o lang, _ land
v lang » va lang, o lang, van lang

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 ((v lang) or (_ lang)) xa hoi. hieu ((ve cac) or (va cham)) truc va hanh di cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((v lang) OR (_ lang)) xa hoi. hieu ((ve cac) OR (va cham)) truc va hanh di cua tu.
• Adding a wildcard symbol may retrieve word variants: su sach ((v lang) or (_ lang)) xa hoi. hieu ((ve cac) or (va cham)) truc va hanh di cua tu*.