Perhaps you should try some spelling variations:
trung va » truong va, trang va, trung ha
bo sach » co 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, luy tre
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang

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

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