Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
theo sach » thuoc sach, te sach, theo lich
trang cua » tranh cua, tang cua, trung cua
hieu cac » hieu luc, hieu va, hieu van
hang cua » mang cua, hang ca, huong cua
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((theo sach) or (hieu cac)) - hanh ((trang cua) or (hang cua)) thong cong tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((theo sach) OR (hieu cac)) - hanh ((trang cua) OR (hang cua)) thong cong tan toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((theo sach) or (hieu cac)) - hanh ((trang cua) or (hang cua)) thong cong tan toan ban*.