Perhaps you should try some spelling variations:
trong vang » trong van, trong dang, trong tang
hoc thieu » toc thieu, hoc hien
nang quan » ban quan, nang suat
vang toan » van toan, dang toan, quang toan
ho chieu » theo chieu, doi chieu, mot chieu
nang dua » nang du, nang suat, nang luc
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (hoc thieu)) xanh - anh ((nang quan) or (nang dua)) dung trong vang toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) xanh - anh ((nang quan) OR (nang dua)) dung trong vang toan cao.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc thieu)) xanh - anh ((nang quan) or (nang dua)) dung trong vang toan cao*.