Perhaps you should try some spelling variations:
danh giao » doanh giao, danh gia, anh giao
doc sach » hoc sach, toc sach, nuoc sach
hieu van » hieu va, thien van, lieu va
tu tieng » luc tieng, tu tuong, tu trong
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
van cac » van hac, van cau, van bac
va danh » va dinh, va dan, va hanh
su tien » su kien, su hien, dau tien
cac xuc » cam xuc, cac nuoc, chat xuc
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc sach) or (cuoc cach)) ty nang xa hoi. hieu van cac xuc va danh giao ((su tien) or (tu tieng))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc sach) OR (cuoc cach)) ty nang xa hoi. hieu van cac xuc va danh giao ((su tien) OR (tu tieng)).
• Adding a wildcard symbol may retrieve word variants: ((doc sach) or (cuoc cach)) ty nang xa hoi. hieu van cac xuc va danh giao ((su tien) or (tu tieng))*.