Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
chiet tach » chieu sach
nhung cong » dung cong, thong cong, hang cong
hanh dinh » thanh dinh, hinh dinh, hanh tinh
vat nhung » va nhung, vap nhung, vai nhung
dinh vat » sinh vat, dinh van, dinh dat
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan tap » toan 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 ((thieu quang) or (chiet tach)) - hanh dinh vat nhung cong tan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu quang) OR (chiet tach)) - hanh dinh vat nhung cong tan toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu quang) or (chiet tach)) - hanh dinh vat nhung cong tan toan tap*.