Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban thanh » ban hanh, ban hang
thanh vi » hanh vi, thanh va, thanh ve
cam tuc » cam tu, nam thuc, dam thuc
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
sach v » sach va, sach 2, sach vay
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: su ((sach v) or (sach y)) nang ma hoi. hieu va ((cam tuc) OR (cam xuc)) ban thanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach v) OR (sach y)) nang ma hoi. hieu va ((cam tuc) OR (cam xuc)) ban thanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach v) or (sach y)) nang ma hoi. hieu va ((cam tuc) OR (cam xuc)) ban thanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: su ((sach v) or (sach y)) nang ma hoi. hieu va ((cam tuc) OR (cam xuc)) ban thanh vi cua triet*.