Perhaps you should try some spelling variations:
hanh trinh » canh tranh
thien van » thi van
toc sach » hoc sach, doc sach, thuoc sach
cam luc » cam xuc, cau luc
van cam » van nam, van lam, van cau
y lang » _ lang, tay lang, yen lang
luc va » duc va, tuc va, loc va
o lang » hoa lang, hoi lang
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((y lang) or (o lang)) xa hoi. thien van cam luc va ((hanh trinh) OR (hanh chinh)) cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((y lang) OR (o lang)) xa hoi. thien van cam luc va ((hanh trinh) OR (hanh chinh)) cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((y lang) or (o lang)) xa hoi. thien van cam luc va ((hanh trinh) OR (hanh chinh)) cua su".
• Adding a wildcard symbol may retrieve word variants: toc sach ((y lang) or (o lang)) xa hoi. thien van cam luc va ((hanh trinh) OR (hanh chinh)) cua su*.