Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
cham tuc » pham thuc, tham thuc, cham soc
hanh hoi » hanh thoi, hanh noi, hanh hoa
hoi cua » hoi chuc
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, te sach, tu cach
hieu vu » hieu va, hieu ve, hieu su
su sach » so sach, vu sach
cua tu » cua tuc, cua su, cua cu
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: ((tu sach) or (su sach)) ky nang x hoi. hieu vu ((cham tuc) OR (nham thuc)) va hanh hoi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang x hoi. hieu vu ((cham tuc) OR (nham thuc)) va hanh hoi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky nang x hoi. hieu vu ((cham tuc) OR (nham thuc)) va hanh hoi cua tu".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang x hoi. hieu vu ((cham tuc) OR (nham thuc)) va hanh hoi cua tu*.