Perhaps you should try some spelling variations:
trung va » truong va, trang va, trung ha
so sach » so sanh, bo sach, hoc sach
co sach » bo sach, cuon sach, hoc sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
luu tre » luu tru, cuu tre, luy tre
y nang » ky nang, ly nang, v nang
vi luu » vi lua

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 (co sach)) y nang xa hoi. hieu ve cham ((duc va) or (trung va)) hanh vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (co sach)) y nang xa hoi. hieu ve cham ((duc va) OR (trung va)) hanh vi luu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (co sach)) y nang xa hoi. hieu ve cham ((duc va) or (trung va)) hanh vi luu tre".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (co sach)) y nang xa hoi. hieu ve cham ((duc va) or (trung va)) hanh vi luu tre*.