Perhaps you should try some spelling variations:
thue hang » thuy hang, thue thanh, thuc hanh
chat truc » cau truc, chat xuc
vanh thai » anh thai, van thai, vanh tai
cua triet » cua viet, su triet, va triet
thu hang » thi hang, thuc hanh, thu huong
hieu van » hieu va, thien van, lieu va
van chat » cao chat
thai cua » than cua, tai cuc, tri cua
te sach » toc sach
truc va » thuc va, thuc vat, trung va
va vanh » va van, va danh, va hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((thue hang) or (thu hang)) cau hoi. hieu van chat truc va vanh thai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((thue hang) OR (thu hang)) cau hoi. hieu van chat truc va vanh thai cua triet.
• Adding a wildcard symbol may retrieve word variants: te sach ((thue hang) or (thu hang)) cau hoi. hieu van chat truc va vanh thai cua triet*.