Perhaps you should try some spelling variations:
cham luu » cham cuu, chat lua, phap luu
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
sach ly » sach y, sach lo, sach ty
ly hang » ly quang
hang xa » hoang xa, hang va, hang ca
hieu vu » hieu ve, hieu su, dieu vu
hieu va » lieu va, hieu qua
luu van » cuu van, luan van, luu hanh
hanh ki » hanh vi, hanh ky, hanh kien
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 ly hang xa hoi. ((hieu vu) OR (hieu va)) cham luu van hanh ki su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ly hang xa hoi. ((hieu vu) OR (hieu va)) cham luu van hanh ki su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ly hang xa hoi. ((hieu vu) OR (hieu va)) cham luu van hanh ki su triet*.