Perhaps you should try some spelling variations:
khong trong » khoang trong, thong trong, phong trong
thieu sach » chieu sach, thien hach, theo sach
hieu cach » hieu cac, chieu sach, hieu ca
nhung don » nhung van, nhung bo
cua khong » hua khong, cua phuong, cua thuong
trong van » trong cac
van tuan » van quan, van ban, anh tuan
tuan tap » toan tap, tuan tai, tuyen tap
toan » tran

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sach) OR (hieu cach)) - ((nhung don) or (toan doanh)) cua khong trong van tuan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (hieu cach)) - ((nhung don) OR (toan doanh)) cua khong trong van tuan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) OR (hieu cach)) - ((nhung don) or (toan doanh)) cua khong trong van tuan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) OR (hieu cach)) - ((nhung don) or (toan doanh)) cua khong trong van tuan tap*.