Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
thien hach » thien thanh, hien hanh
nhung cong » dung cong, thong cong, hang cong
cong thanh » dong thanh, cong trinh, cong tan
theo sach » thuoc sach, te sach, theo lich
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
thanh van » thanh san, thanh toan, thanh phan

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 (thien hach)) - hanh trung cua nhung cong thanh van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((theo sach) OR (thien hach)) - hanh trung cua nhung cong thanh van ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((theo sach) or (thien hach)) - hanh trung cua nhung cong thanh van ban*.