Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
thanh tai » thanh hai, doanh tai, thanh san
cau triet » cau trieu, su triet, cua triet
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
hang xa » hoang xa, hang va, hang ca
van cam » van nam, van lam, van cau
cam duc » cam xuc, cao duc, pham duc
y hang » ly hang, ty hang, yu hang

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 y hang xa hoi. hieu van cam duc va ((thanh tai) OR (thanh toan)) cau triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y hang xa hoi. hieu van cam duc va ((thanh tai) OR (thanh toan)) cau triet".
• Adding a wildcard symbol may retrieve word variants: tu sach y hang xa hoi. hieu van cam duc va ((thanh tai) OR (thanh toan)) cau triet*.