Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
su triet » su viet, su tien, ve triet
nhan luc » nang luc
thu sach » tu sach, thuat sach, thuoc sach
kho tang » cao tang
va thanh » gia thanh, va tinh, le thanh
te sach » toc sach
hieu va » lieu va, hieu qua
tang ma » mang may, tang van
va nhan » van nhan, ca nhan, va phan
vi su » va su, ve su, ki su

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 (thu sach)) kho tang ma hoa. hieu va nhan luc ((va thanh) OR (ban thanh)) vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thu sach)) kho tang ma hoa. hieu va nhan luc ((va thanh) OR (ban thanh)) vi su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thu sach)) kho tang ma hoa. hieu va nhan luc ((va thanh) OR (ban thanh)) vi su triet".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thu sach)) kho tang ma hoa. hieu va nhan luc ((va thanh) OR (ban thanh)) vi su triet*.