Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
nhu phung » nhu phuong, thu phuong, chu phuong
hoc hieu » hoc thieu, hoc hien, doc hieu
chinh ta » chinh tai, chinh va, chinh tri
van toan » van tuan, van tan, van thanh
toan cao » toan ban, toan tap
sinh va » sinh vat, tinh va, dinh van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - hanh ((chinh ta) OR (sinh va)) nhu phung van toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - hanh ((chinh ta) OR (sinh va)) nhu phung van toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh ((chinh ta) OR (sinh va)) nhu phung van toan cao*.