Perhaps you should try some spelling variations:
dung tren » dung trong, dung trung
manh hanh » xanh hanh, danh thanh, minh thanh
hanh tai » thanh tai, hang tai, han tai
thu sach » thuat sach, thuoc sach, thu hoach
duc manh » suc manh, duc anh, duc minh
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
bao duc » dao duc, bao luc, cao duc
ve bao » te bao, va bao
y nang » ky nang, ly nang, v nang
cua te » cua tu

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)) y nang xa hoi. hieu ve bao duc manh hanh tai ((dung tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y nang xa hoi. hieu ve bao duc manh hanh tai ((dung tren) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) y nang xa hoi. hieu ve bao duc manh hanh tai ((dung tren) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) y nang xa hoi. hieu ve bao duc manh hanh tai ((dung tren) or (cua te))*.