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 nang » vuc nang, va nang, vu dang
lua tre » cua tre, luy tre, dua tren
ve cam » ve cham, ve cac, va cam
v nang » va nang, van nang, voi 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 nang)) 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 nang)) xa hoi. hieu ve cam ((duc va) OR (truc va)) hanh vi lua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((v nang) OR (vu nang)) 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 nang)) xa hoi. hieu ve cam ((duc va) or (truc va)) hanh vi lua tre*.