Perhaps you should try some spelling variations:
thanh di » thanh doi, thanh de, thanh do
vuc nang » cuc nang, vu nang, chuc nang
thuc ban » thuoc ban, thuc dan, thu ban
truc ban » truc dan, truc van, truoc bang
bo sach » co sach, hoc sach
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
so sanh » do sanh
ma hoi » mai hoi, xa hoi, ma hoa
di cua » dai cua, doi cua, de cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((bo sach) or (so sanh)) vuc nang ma hoi. hieu ve cham ((truc ban) OR (thuc ban)) thanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((bo sach) OR (so sanh)) vuc nang ma hoi. hieu ve cham ((truc ban) OR (thuc ban)) thanh di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bo sach) or (so sanh)) vuc nang ma hoi. hieu ve cham ((truc ban) OR (thuc ban)) thanh di cua te".
• Adding a wildcard symbol may retrieve word variants: ((bo sach) or (so sanh)) vuc nang ma hoi. hieu ve cham ((truc ban) OR (thuc ban)) thanh di cua te*.