Perhaps you should try some spelling variations:
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
truc va » thuc va, thuc vat, trung va
luy tre » luyen tre
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
vi luy » vi lua, vi luu

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 y nang xa hoi. hieu va cam ((duc va) or (truc va)) hanh vi luy tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu va cam ((duc va) OR (truc va)) hanh vi luy tre.
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu va cam ((duc va) or (truc va)) hanh vi luy tre*.