Perhaps you should try some spelling variations:
thien nang » thien bang, thien dang, trien nang
thue nang » thuat nang, thi nang, chuc nang
thu sach » tu sach, thuat sach, thuoc sach
hieu va » lieu va, hieu qua
dinh di » dinh du, dinh vi, danh di
luc va » tuc va, loc va
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: thu sach ((thue nang) or (thien nang)) xa hoi. hieu va cac ((luc va) OR (duc va)) dinh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((thue nang) OR (thien nang)) xa hoi. hieu va cac ((luc va) OR (duc va)) dinh di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((thue nang) or (thien nang)) xa hoi. hieu va cac ((luc va) OR (duc va)) dinh di cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach ((thue nang) or (thien nang)) xa hoi. hieu va cac ((luc va) OR (duc va)) dinh di cua te*.