Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
lang van » dang van, tang van, hoang van
nhan luc » nang luc
cua viet » ca viet, hoa viet, cua vat
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
va nhan » van nhan, ca nhan, va phan
lang xa » lang ha, dang xay
dao cao » dao tao, bao cao, tao cao
cao cua » ca cua, co cua, cau cua
luc va » duc va, tuc va, loc va
va dao » ca dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y ((((lang xa) OR (lang van))) or (nang ma)) hoi. hieu va nhan luc va dao cao cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((((lang xa) OR (lang van))) OR (nang ma)) hoi. hieu va nhan luc va dao cao cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y ((((lang xa) OR (lang van))) or (nang ma)) hoi. hieu va nhan luc va dao cao cua viet".
• Adding a wildcard symbol may retrieve word variants: thu sach y ((((lang xa) OR (lang van))) or (nang ma)) hoi. hieu va nhan luc va dao cao cua viet*.