Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
danh doi » danh di, thanh doi, dung doi
han danh » van danh, phan dang, nhan dang
thuc han » thuc hanh, thuc chan, thuc huan
cam thuc » am thuc, nam thuc, cam thu
so sach » bo sach, co sach, hoc sach
van cam » van nam, van lam, van cau
nang xa » nang x, lang xa, nang ma
so sanh » do sanh
y nang » ky nang, ly nang, v nang
cua tu » cua tuc, cua cu, cua te
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (so sanh)) y nang xa hoi. hieu van cam thuc han danh doi ((cua tu) OR (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) y nang xa hoi. hieu van cam thuc han danh doi ((cua tu) OR (cua su)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (so sanh)) y nang xa hoi. hieu van cam thuc han danh doi ((cua tu) OR (cua su))".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) y nang xa hoi. hieu van cam thuc han danh doi ((cua tu) OR (cua su))*.