Perhaps you should try some spelling variations:
dieu kien » dien bien
danh vai » danh sai, danh va, doanh van
su sach » so sach, vu sach
cac lop » cac hop, cac loai
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
vai cua » dai cua, hai cua, lai cua
sach ty » sach y, sach tu, sach thu
va danh » va dinh, va dan, va hanh
cac lo » cac co, cac bo, cac ho
cua te » cua tu

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 ty nang xa hoi. ((dieu kien) OR (dieu khien)) ((cac lo) or (cac lop)) va danh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. ((dieu kien) OR (dieu khien)) ((cac lo) OR (cac lop)) va danh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. ((dieu kien) OR (dieu khien)) ((cac lo) or (cac lop)) va danh vai cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. ((dieu kien) OR (dieu khien)) ((cac lo) or (cac lop)) va danh vai cua te*.