Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hanh hoi » hanh thoi, hanh noi, hanh moi
hanh hoa » thanh hoa, khanh hoa, hang hoa
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
duc van » duc va, duc tan, duc manh
chuc te » thuc te, chuc ke, chuc theo
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y nang xa hoi. hieu ve pham duc van ((hanh hoi) OR (hanh hoa)) chuc te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang xa hoi. hieu ve pham duc van ((hanh hoi) OR (hanh hoa)) chuc te".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang xa hoi. hieu ve pham duc van ((hanh hoi) OR (hanh hoa)) chuc te*.