Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
nhung cong » dung cong, thong cong, hang cong
hien sach » dien sach, kien sach, chieu sach
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
phan tap » phan lap, han tap, pha tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien sach) OR (thien hach)) - hanh ((trung cua) or (trung cap)) nhung cong dan phan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien sach) OR (thien hach)) - hanh ((trung cua) OR (trung cap)) nhung cong dan phan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien sach) OR (thien hach)) - hanh ((trung cua) or (trung cap)) nhung cong dan phan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien sach) OR (thien hach)) - hanh ((trung cua) or (trung cap)) nhung cong dan phan tap*.