Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
thanh vi » hanh vi, thanh va, thanh ve
thu sach » thuat sach, thuoc sach, thu hoach
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
van cam » van nam, van lam, van cau
xuc van » luc van, xuc ban, thuc van
duc van » duc va, duc tan, duc manh
tu sach » su sach, te sach, tu cach
ma hoi » mai hoi, xa hoi, ma hoa
vi cua » vai cua, di cua

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) or (thu sach)) ty nang ma hoi. hieu van cam ((xuc van) OR (duc van)) thanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty nang ma hoi. hieu van cam ((xuc van) OR (duc van)) thanh vi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ty nang ma hoi. hieu van cam ((xuc van) OR (duc van)) thanh vi cua triet*".