Perhaps you should try some spelling variations:
ve triet » va trien, su triet
hanh lai » hanh lam, hanh tai, thanh lap
tru nang » tra nang, tri nang, truc nano
xa hanh » xa thanh, xa khanh, va hanh
hieu va » lieu va, hieu qua
bo sach » co sach, hoc sach
tu nang » tu nong, tu nano, tu lang
hieu ve » hieu van
ma hoi » mai hoi, xa hoi, ma hoa
cac tu » cac thu, cach tu, cac du
lai ve » loai ve, lai va, la ve
tu xa » tu xay, tu va, te xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach ((tu nang) OR (tru nang)) ma hoi. ((hieu ve) or (hieu va)) cac tu xa hanh lai ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach ((tu nang) OR (tru nang)) ma hoi. ((hieu ve) OR (hieu va)) cac tu xa hanh lai ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo sach ((tu nang) OR (tru nang)) ma hoi. ((hieu ve) or (hieu va)) cac tu xa hanh lai ve triet".
• Adding a wildcard symbol may retrieve word variants: bo sach ((tu nang) OR (tru nang)) ma hoi. ((hieu ve) or (hieu va)) cac tu xa hanh lai ve triet*.