Perhaps you should try some spelling variations:
sach thi » sach thu, sach tai, sach thieu
thi nang » thi cong, ki nang, thi hanh
van hanh » van thanh, ban hanh, van anh
vu sach » vu bach, su sach, vu khach
hanh li » nhanh li, hanh vi, han li
xuc van » duc van, luc van, vuc van
ca viet » va viet, co viet, hoa viet
va cam » va cham, va cac, va cao
ve cam » ve cham, ve cac, ve cau
ve cai » va cai, ve cac, ve tai
x hoi » xa hoi, o hoi, x ho
li ca » ly ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach thi nang x hoi. hieu ((((ve cam) or (ve cai))) or (va cam)) xuc van hanh li ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach thi nang x hoi. hieu ((((ve cam) OR (ve cai))) OR (va cam)) xuc van hanh li ca viet.
• Adding a wildcard symbol may retrieve word variants: vu sach thi nang x hoi. hieu ((((ve cam) or (ve cai))) or (va cam)) xuc van hanh li ca viet*.