Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
tu sach » thu sach, su sach, te sach
hieu ve » hieu van
hieu va » lieu va, hieu qua
soc gia » toc gia, hoc gia, so gia
tu tren » tu truyen, tu tieng, tu trong
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, x ho, 5 hoi
o hoi » co hoi, o hoc, o hai
vi tu » vi tut, voi tu, va 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 y nang ((x hoi) OR (o hoi)). ((hieu ve) or (hieu va)) cham soc gia thanh vi tu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ((x hoi) OR (o hoi)). ((hieu ve) OR (hieu va)) cham soc gia thanh vi tu tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ((x hoi) OR (o hoi)). ((hieu ve) or (hieu va)) cham soc gia thanh vi tu tren".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((x hoi) OR (o hoi)). ((hieu ve) or (hieu va)) cham soc gia thanh vi tu tren*.