Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
sach ky » sac ky, sach y, sach ty
cau cua » cau qua, ca cua, cu cua
dau cua » dai cua, day cua, dan cua
va danh » va dinh, va dan, va hanh
te sach » toc sach
hieu vu » hieu va, hieu ve, hieu su
tang ma » mang may, tang van
nang ma » sang ma, nang cao, mang may
vu cham » va cham, vu kham, tu cham
luc va » duc va, tuc va, loc va

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 ky ((nang ma) OR (tang ma)) hoi. hieu vu cham luc va danh ((dau cua) or (cau cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang ma) OR (tang ma)) hoi. hieu vu cham luc va danh ((dau cua) OR (cau cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang ma) OR (tang ma)) hoi. hieu vu cham luc va danh ((dau cua) or (cau cua)) triet".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang ma) OR (tang ma)) hoi. hieu vu cham luc va danh ((dau cua) or (cau cua)) triet*.