Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van ban
cham luu » cham cuu, chat lua, phap luu
van anh » van thanh, tuan anh, van minh
hieu vu » hieu va, hieu ve, hieu su
tu sach » thu sach, su sach, tu cach
hang xa » hoang xa, hang va, hang ca
ly hang » ly quang
te sach » toc sach
vu cham » va cham, vu kham, tu cham
ki su » ky su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (te sach)) ly hang xa hoi. hieu vu cham luu ((van hanh) or (van anh)) ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ly hang xa hoi. hieu vu cham luu ((van hanh) OR (van anh)) ki su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ly hang xa hoi. hieu vu cham luu ((van hanh) or (van anh)) ki su triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) ly hang xa hoi. hieu vu cham luu ((van hanh) or (van anh)) ki su triet*.