Perhaps you should try some spelling variations:
qua cham » qua hai, qua cac, va cham
toc sach » hoc sach, doc sach, thuoc sach
thu nang » thi nang, thu hang, tho nang
van hanh » van thanh, ban hanh, van anh
thu bang » thu ban, thu hang, chu bang
cham luc » cham soc, nhan luc, cham cuu
hanh di » hanh vi, hanh de, hang di
luc van » luoc van, luu van, duc van
di cua » dai cua, doi cua, de cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (toc sach)) ((thu nang) OR (thu bang)) xa hoi. hieu qua cham luc van hanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ((thu nang) OR (thu bang)) xa hoi. hieu qua cham luc van hanh di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) ((thu nang) OR (thu bang)) xa hoi. hieu qua cham luc van hanh di cua te".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ((thu nang) OR (thu bang)) xa hoi. hieu qua cham luc van hanh di cua te*.