Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc chieu » hoc thieu, hoc hien, hoc dieu
tang vatn » tang van, dang van, tan van
ho chieu » theo chieu, hoc thieu, doi chieu
tang vat » tang van, dang vat, bang vat
cong tam » cong tac, cong tan, cong nam
tam toan » tap toan, tam than, pham toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc chieu) or (ho chieu)) sach - hanh ((tang vat) or (tang vatn)) nhung cong tam toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (ho chieu)) sach - hanh ((tang vat) OR (tang vatn)) nhung cong tam toan ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) or (ho chieu)) sach - hanh ((tang vat) or (tang vatn)) nhung cong tam toan ban*.