Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
thu sach » thuat sach, thuoc sach, thu hoach
tu sach » su sach, te sach, tu cach
bat cua » ban cua, mat cua, bai cua
va dinh » van dinh, va kinh, va tinh
va danh » va dan, va hanh, dia danh
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet

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 (thu sach)) ty lang xa hoi. hieu vu cham luc ((va danh) OR (va dinh)) bat cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty lang xa hoi. hieu vu cham luc ((va danh) OR (va dinh)) bat cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ty lang xa hoi. hieu vu cham luc ((va danh) OR (va dinh)) bat cua tre*".