Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van anh
cham luc » cham soc, nhan luc, cham cuu
va cham » va chat, va tham
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
sac ky » cac ky, sai ky
x hoi » xa hoi, o hoi, x ho
vi su » va su, ve su, ki su
tuan » quan, tran, luan

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

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