Perhaps you should try some spelling variations:
sach van » sach han, sach va, bach van
van nang » van quang, van ban, van dong
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
xuc van » duc van, xuc ban, thuc van
luc van » luoc van, luu van, duc van
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, va cam
vi su » va su, ve su, ki su

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 van nang ma hoi. hieu ve cam ((xuc van) or (luc van)) hanh vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach van nang ma hoi. hieu ve cam ((xuc van) OR (luc van)) hanh vi su triet.
• Adding a wildcard symbol may retrieve word variants: su sach van nang ma hoi. hieu ve cam ((xuc van) or (luc van)) hanh vi su triet*.