Perhaps you should try some spelling variations:
su sach » so sach, vu sach
truc va » thuc va, thuc vat, trung va
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
ly nang » ky nang, ly hang, ly vang
luu tre » luu tru, cuu tre, luy tre
y nang » ky nang, v nang, may nang
tuc va » thuc va, tuc xa, duc va
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: su sach ((y nang) OR (ly nang)) xa hoi. hieu ve cham ((tuc va) or (truc va)) hanh vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (ly nang)) xa hoi. hieu ve cham ((tuc va) OR (truc va)) hanh vi luu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) OR (ly nang)) xa hoi. hieu ve cham ((tuc va) or (truc va)) hanh vi luu tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) OR (ly nang)) xa hoi. hieu ve cham ((tuc va) or (truc va)) hanh vi luu tre*.