Perhaps you should try some spelling variations:
su sach » so sach
vu sach » vu bach, vu khach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
truc va » thuc va, thuc vat, trung va
luy tre » luyen tre
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
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) OR (vu sach)) y nang xa hoi. hieu ve 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) OR (vu sach)) y nang xa hoi. hieu ve cam ((duc va) OR (truc va)) hanh vi luy tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) y nang xa hoi. hieu ve cam ((duc va) or (truc va)) hanh vi luy tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) y nang xa hoi. hieu ve cam ((duc va) or (truc va)) hanh vi luy tre*.