Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
cham xuc » cam xuc, chat xuc, cham soc
van hanh » van thanh, ban hanh, van anh
vu sach » vu bach, su sach, vu khach
va cham » va chat, va tham
nang o » nang co, nang ho, nang ro
vai va » mai va, dai va, hai va
o hoi » co hoi, o hoc, o hai
vu va » vu van, tu va, su va
tinh » trinh, dinh, minh
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: vu sach thu nang o hoi. lieu va cham xuc ((may tinh) or (van hanh)) ((vu va) or (vai va)) thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach thu nang o hoi. lieu va cham xuc ((may tinh) OR (van hanh)) ((vu va) OR (vai va)) thiet.
• Adding a wildcard symbol may retrieve word variants: vu sach thu nang o hoi. lieu va cham xuc ((may tinh) or (van hanh)) ((vu va) or (vai va)) thiet*.