Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nam thuc » nam thuoc, am thuc, nam thu
hang tai » dung tai
sach tai » sach bai, sach tham, sach dao
thuc dan » thuc hanh, hoc dan, thuc vat
sach thi » sach thu, sach thieu, sach tham
hieu le » hieu ve, hieu he, hieu ly
hang xa » hoang xa, hang ca, lang xa
le nam » ly nam, he nam, le na

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach thi) OR (sach tai)) hang xa hoi. hieu le nam thuc dan ((hang tai) or (hang va)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach thi) OR (sach tai)) hang xa hoi. hieu le nam thuc dan ((hang tai) OR (hang va)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach thi) OR (sach tai)) hang xa hoi. hieu le nam thuc dan ((hang tai) or (hang va)) cua triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach thi) OR (sach tai)) hang xa hoi. hieu le nam thuc dan ((hang tai) or (hang va)) cua triet*.