Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
va hanh » van hanh, va thanh, va danh
cac lop » cac hop, cac loai
su sach » so sach
nang xa » nang x, lang xa, nang ma
vu sach » vu bach, vu khach
cac lo » cac co, cac bo, cac ho
vi cua » vai cua, di cua
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) or (vu sach)) ky nang xa hoi. hieu hien ((cac lo) OR (cac lop)) va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky nang xa hoi. hieu hien ((cac lo) OR (cac lop)) va hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ky nang xa hoi. hieu hien ((cac lo) OR (cac lop)) va hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky nang xa hoi. hieu hien ((cac lo) OR (cac lop)) va hanh vi cua te*.