Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
qua tham » qua cham, qua than, qua thanh
tham loc » tham nuoc, cham soc, hau loc
danh dai » danh dau, danh di, danh sai
sach ky » sach y, sach ty, sach kem
va danh » va dinh, va dan, va hanh
sac ky » cac ky, sai ky
loc va » hoc va, luc va
cua cu » cua chu, cua cau, cua su
x hoi » xa hoi, o hoi, x ho

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 ky) OR (sac ky)) nang x hoi. hieu qua tham loc va danh dai ((cua triet) or (cua cu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sac ky)) nang x hoi. hieu qua tham loc va danh dai ((cua triet) OR (cua cu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sac ky)) nang x hoi. hieu qua tham loc va danh dai ((cua triet) or (cua cu))".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) OR (sac ky)) nang x hoi. hieu qua tham loc va danh dai ((cua triet) or (cua cu))*.