Perhaps you should try some spelling variations:
vat triet » va triet, va trien, ve triet
thanh van » thanh san, thanh toan, thanh phan
van vat » van chat, nhan vat
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
ky lang » ky nang, ky dang, ky tang
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va
ha hoi » hoa hoi, ha noi, va hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky lang ((ha hoi) OR (xa hoi)). hieu ve cam ((xuc va) or (tuc xa)) thanh van vat triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang ((ha hoi) OR (xa hoi)). hieu ve cam ((xuc va) OR (tuc xa)) thanh van vat triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky lang ((ha hoi) OR (xa hoi)). hieu ve cam ((xuc va) or (tuc xa)) thanh van vat triet*".