Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
thu sach » tu sach, thuat sach, thuoc sach
kho tang » cao tang
thanh va » thanh van, hanh va, thanh ha
va thanh » gia thanh, ban thanh, va tinh
te sach » toc sach
su tien » su hien, tu tieng, dau tien
hieu va » lieu va, hieu qua
va cham » va chat, va tham
tang ma » mang may, tang van
luc va » duc va, tuc va, loc va
kien » bien, vien, dien

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