Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
doi chieu » doc hieu, doi chi, ho chieu
trong dan » trong dang, trong san, trong tan
tang vat » tang van, dang vat, bang vat
thong va » thong cua, truong va, thong qua
dan toan » van toan, dan than, manh toan
toan cau » 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: ((hoc thieu) or (doi chieu)) xanh - hanh ((tang vat) or (thong va)) dung trong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (doi chieu)) xanh - hanh ((tang vat) OR (thong va)) dung trong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (doi chieu)) xanh - hanh ((tang vat) or (thong va)) dung trong dan toan cau*.