Perhaps you should try some spelling variations:
hieu quan » hieu qua, lieu quan, thien quan
quan cau » quang cao, toan cau, quan ha
hanh van » thanh van, khanh van, hanh va
cau theo » cau thi, cau tao
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
van cau » van dau, van hau, van chat
sac ky » cac ky
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 ((sac ky) OR (sai ky)) nang x hoi. hieu quan cau truc va hanh van cau theo~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sac ky) OR (sai ky)) nang x hoi. hieu quan cau truc va hanh van cau theo".
• Adding a wildcard symbol may retrieve word variants: su ((sac ky) OR (sai ky)) nang x hoi. hieu quan cau truc va hanh van cau theo*.