Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
huong doi » huong dan, trong doi, dung doi
sat huong » suat huong, san huong, sat muong
cham tuc » pham thuc, tham thuc, cham soc
cau tren » cu tren, dau tren, ca tren
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau treo
su sach » so sach, vu sach
y nang » ky nang, ly nang, v nang
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 y nang x hoi. hieu ve ((cham tuc) or (nham thuc)) sat huong doi ((cuu tre) OR (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x hoi. hieu ve ((cham tuc) OR (nham thuc)) sat huong doi ((cuu tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang x hoi. hieu ve ((cham tuc) or (nham thuc)) sat huong doi ((cuu tre) OR (cau tren))".
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. hieu ve ((cham tuc) or (nham thuc)) sat huong doi ((cuu tre) OR (cau tren))*.