Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
va cham » va chat, va tham
kinh su » kinh suu, hinh su, dinh su
xuc va » tuc va, luc va, xac va
x hoi » xa hoi, o hoi, x ho
su va » su van, tu va
thiet* » thieu*

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 ty nang x hoi. hieu va cham ((xuc va) or (duc va)) kinh su va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu va cham ((xuc va) OR (duc va)) kinh su va thiet*.