Perhaps you should try some spelling variations:
lam thay » la thay, tam than, bac thay
lam chay » lam chat, lam cha, lam chu
van hanh » van thanh, ban hanh, van anh
cau xuc » cam xuc, cau luc, cau truc
xuc van » duc van, luc van, vuc van
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
sach tu » sach thu, cach tu, sach ty
va cau » van cau, va cac, va dau
x hoi » xa hoi, o hoi, x ho

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 ky) or (sach tu)) nang x hoi. hieu va cau xuc van hanh ((lam chay) OR (lam thay)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach tu)) nang x hoi. hieu va cau xuc van hanh ((lam chay) OR (lam thay)) tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach tu)) nang x hoi. hieu va cau xuc van hanh ((lam chay) OR (lam thay)) tren".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach tu)) nang x hoi. hieu va cau xuc van hanh ((lam chay) OR (lam thay)) tren*.