Perhaps you should try some spelling variations:
thanh tung » thanh cong
dung cong » dung trong
hoc kien » hoc hien, hoc vien, hoa kien
kien mac » dien mao, tien mai, kien ha
tung cap » trung cap, cung cap, thong cap
cap dung » ap dung, cao dung, chan dung
cong san » cong tac
phan cac » nhan cach, phan dau, phan lap
khan ap » khan cap, han ap, khan dam

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc kien mac - thanh tung cap dung cong san ((phan cac) or (khan ap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc kien mac - thanh tung cap dung cong san ((phan cac) OR (khan ap)).
• Adding a wildcard symbol may retrieve word variants: hoc kien mac - thanh tung cap dung cong san ((phan cac) or (khan ap))*.