Perhaps you should try some spelling variations:
hoc thieu » hoc hien
lang cong » dang cong, bang cong, hang cong
tuong va » truong va, thuong va, luong va
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan cao » toan ban, toan tap
tung va » trung va, dung va, vung va

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)) sach - thanh ((tung va) or (tuong va)) lang cong van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (toc thieu)) sach - thanh ((tung va) OR (tuong va)) lang cong van toan cao.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (toc thieu)) sach - thanh ((tung va) or (tuong va)) lang cong van toan cao*.