Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
trinh cong » trinh dung
qua trinh » qua kinh
cong lang » cong vang, cong luong, cong quang
anh tang » anh bang, anh dang, anh nang
tang qua » tang quan, tang cua, tang quy
than tap » phan tap, than cap, thanh lap
toan tap » toan ban
han tap » han tai, nhan tai, nhan tao

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 nhanh - anh tang qua trinh cong lang ((((than tap) OR (toan tap))) or (han tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nhanh - anh tang qua trinh cong lang ((((than tap) OR (toan tap))) OR (han tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien nhanh - anh tang qua trinh cong lang ((((than tap) OR (toan tap))) or (han tap))".
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - anh tang qua trinh cong lang ((((than tap) OR (toan tap))) or (han tap))*.