Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hanh trung » thanh trung, hanh trang, manh trung
nhung cong » dung cong, thong cong, hang cong
hien hach » hien hanh, hien nhanh, hien khanh
trung cua » truong cua, trung tuan, trung cap
dang cong » dung cong
dan thai » dang thai, dan thi, dan than
thai cao » tai cao, thoai cac, thuat cao

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