Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhung cong » dung cong, thong cong, hang cong
trung pha » trung phan, trung phat, trung ha
pha nhung » phai nhuong, tham nhung, phan chung
hien anh » hien hanh, thien anh, dien anh
cong tan » cong tac, cong san, cong thanh
than tap » toan tap, han tap, than cap
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 anh) or (dieu hanh)) - thanh trung pha nhung cong tan ((than tap) OR (phan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien anh) OR (dieu hanh)) - thanh trung pha nhung cong tan ((than tap) OR (phan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien anh) or (dieu hanh)) - thanh trung pha nhung cong tan ((than tap) OR (phan tap))".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien anh) or (dieu hanh)) - thanh trung pha nhung cong tan ((than tap) OR (phan tap))*.