Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
hanh mai » hanh ma, hanh mau, hanh may
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, va danh
so sach » bo sach, co sach, hoc sach
so sanh » do sanh
hieu va » lieu va, hieu qua
v nang » va nang, vu nang, van nang
ma hoi » mai hoi, xa hoi, ma hoa
cam tu » cam thu, nam tu, dam tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) OR (so sanh)) v nang ma hoi. hieu va ((cam tu) or (cam xuc)) va hanh mai va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) v nang ma hoi. hieu va ((cam tu) OR (cam xuc)) va hanh mai va trien*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (so sanh)) v nang ma hoi. hieu va ((cam tu) or (cam xuc)) va hanh mai va trien*".