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
vu dang » su dang, vu quang, cua dang
lua tre » cua tre, luy tre, dua tren
ve cam » ve cham, ve cac, va cam
v nang » va nang, vu nang, van nang
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 ((v nang) or (vu dang)) xa hoi. hieu ve cam ((duc va) or (truc va)) hanh vi lua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((v nang) OR (vu dang)) xa hoi. hieu ve cam ((duc va) OR (truc va)) hanh vi lua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ((v nang) or (vu dang)) xa hoi. hieu ve cam ((duc va) or (truc va)) hanh vi lua tre*.