Perhaps you should try some spelling variations:
nhanh trinh » hanh trinh, nhanh tinh, thanh trinh
nhung huong » nhung phuong, nhung tuong, nhung cong
trinh vat » trinh van, trinh luat, sinh vat
vat nhung » va nhung, vap nhung, vai nhung
than sao » than so, than vao, thanh san
toan cao » toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu qua - nhanh trinh vat nhung huong dan ((than sao) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu qua - nhanh trinh vat nhung huong dan ((than sao) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: ho hieu qua - nhanh trinh vat nhung huong dan ((than sao) or (toan cao))*.