Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van anh
qua cham » qua hai, qua cac, va cham
cham luc » cham soc, nhan luc, cham cuu
cao hoc » co hoc, cho hoc, chat hoc
sach ty » sach y, sach tu, sach thu
cao hoi » cau hoi, co hoi, tao hoi
va danh » va dinh, va dan, va hanh
ty nang » ky nang, ty xang, ty hang
su sach » so sach, vu sach
hoi su » hoi suc, khoi su, thoi su

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty nang ((cao hoi) or (cao hoc)). hieu qua cham luc ((van hanh) or (va danh)) hoi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang ((cao hoi) OR (cao hoc)). hieu qua cham luc ((van hanh) OR (va danh)) hoi su triet.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang ((cao hoi) or (cao hoc)). hieu qua cham luc ((van hanh) or (va danh)) hoi su triet*.