Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
vu sach » vu bach, su sach, vu khach
lang xa » lang ha, dang xay, lang van
van cac » van cau, van bac, dan cac
van hac » van hoc, van ha, van hai
va hanh » van hanh, va thanh, va danh
luc va » duc va, tuc va, loc va
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach _ lang xa hoi. thien ((van cac) or (van hac)) luc va hanh dai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach _ lang xa hoi. thien ((van cac) OR (van hac)) luc va hanh dai cua tu.
• Adding a wildcard symbol may retrieve word variants: vu sach _ lang xa hoi. thien ((van cac) or (van hac)) luc va hanh dai cua tu*.