Perhaps you should try some spelling variations:
thien van » thi van
thanh lap » thanh san, phan lap, thanh hai
thu sach » tu sach, thuat sach, thuoc sach
cua viet » ca viet, hoa viet, cua vat
mai hoi » mai khoi, dai hoi, lai hoi
sach ty » sach y, sach tu, sach thu
van bac » van ban, van bao, van hac
ty nang » ky nang, ty xang, ty hang
lap cua » lai cua, tap cua, lam cua
ma hoi » xa hoi, ma hoa, me hoi
xuc va » tuc va, luc va, xac va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty nang ((ma hoi) OR (mai hoi)). thien van bac ((xuc va) or (duc va)) thanh lap cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang ((ma hoi) OR (mai hoi)). thien van bac ((xuc va) OR (duc va)) thanh lap cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty nang ((ma hoi) OR (mai hoi)). thien van bac ((xuc va) or (duc va)) thanh lap cua viet*".