Perhaps you should try some spelling variations:
hanh trinh » canh tranh
so sach » so sanh, bo sach, co sach
thi van » thi lan, thi hanh, thi nang
van bac » van ban, van bao, van hac
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
luat te » luat ve, luat ke, luat tu
y nang » ky nang, ly nang, v nang
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y nang o hoi. thi van bac ((xuc van) or (duc van)) ((hanh trinh) OR (hanh chinh)) luat te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang o hoi. thi van bac ((xuc van) OR (duc van)) ((hanh trinh) OR (hanh chinh)) luat te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang o hoi. thi van bac ((xuc van) or (duc van)) ((hanh trinh) OR (hanh chinh)) luat te".
• Adding a wildcard symbol may retrieve word variants: so sach y nang o hoi. thi van bac ((xuc van) or (duc van)) ((hanh trinh) OR (hanh chinh)) luat te*.