Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
phat xuc » chat xuc, phat xuat, phap xu
van hanh » van thanh, ban hanh, van anh
tu cach » tu cac
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
doi cua » hoi cua
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 cach) or (thu sach)) ky nang x hoi. hieu va phat xuc van hanh ((doi cua) OR (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (thu sach)) ky nang x hoi. hieu va phat xuc van hanh ((doi cua) OR (dai cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (thu sach)) ky nang x hoi. hieu va phat xuc van hanh ((doi cua) OR (dai cua)) tre*".