Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
cua viet » ca viet, hoa viet, cua dieu
te sach » toc sach
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
sach 6 » sach y, sach 2

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 6 tang xa hoi. hieu ve cham luc ((va danh) OR (va hanh)) tu ((cua viet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach 6 tang xa hoi. hieu ve cham luc ((va danh) OR (va hanh)) tu ((cua viet) OR (cua vat)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach 6 tang xa hoi. hieu ve cham luc ((va danh) OR (va hanh)) tu ((cua viet) or (cua vat))".
• Adding a wildcard symbol may retrieve word variants: te sach 6 tang xa hoi. hieu ve cham luc ((va danh) OR (va hanh)) tu ((cua viet) or (cua vat))*.