Perhaps you should try some spelling variations:
su sach » so sach, vu sach
truc va » thuc va, thuc vat, trung va
lua tre » cua tre, dua tren, luat tri
luy tre » luyen tre
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
tuc va » thuc va, tuc xa, duc va
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam

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