Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thu sach » tu sach, thuoc sach, thu hoach
van hanh » van thanh, ban hanh, van anh
vu nang » vuc nang, va nang, vu dang
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
hanh ve » hanh vi, hanh va, hanh kem
su tien » su kien, su hien, tu tieng
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, 5 hoi
ve su » va su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) OR (thuat sach)) vu nang ((x hoi) or (x ho)). hieu va cam xuc van hanh ve su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuat sach)) vu nang ((x hoi) OR (x ho)). hieu va cam xuc van hanh ve su tien*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuat sach)) vu nang ((x hoi) or (x ho)). hieu va cam xuc van hanh ve su tien*".