Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc thieu » hoc hien
trung cua » truong cua, trung tuan, trung cap
cong vang » cong lang, cong quang, cong ngang
vang toan » van toan, dang toan, quang toan
tung cua » tuong cua, dung cua, tang cua
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 (toc thieu)) xanh - thanh ((tung cua) OR (trung cua)) nhung cong vang toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (toc thieu)) xanh - thanh ((tung cua) OR (trung cua)) nhung cong vang toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (toc thieu)) xanh - thanh ((tung cua) OR (trung cua)) nhung cong vang toan cao".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (toc thieu)) xanh - thanh ((tung cua) OR (trung cua)) nhung cong vang toan cao*.