Perhaps you should try some spelling variations:
su sach » so sach, vu sach
ly nang » ky nang, ly hang, ly vang
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
truc va » thuc va, thuc vat, trung va
luu tre » luu tru, cuu tre, luy tre
y nang » ky nang, v nang, may nang
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 xa) 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 xa) 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 xa) or (truc va)) hanh vi luu tre*.