Perhaps you should try some spelling variations:
thieu quang » thien quan, trien quang, hieu quan
hieu quang » hieu quan, hieu qua, diep quang
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
nhung cong » dung cong, thong cong, hang cong
cua nhung » va nhung
tinh cua » trinh cua, sinh cua, tinh chat
cong tan » cong tac, cong san, cong thanh
tan gian » tran gian, dan gian, van gian
gian man » gian dan, gian lan, gian van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu quang) or (thieu quang)) - nhanh tinh cua nhung cong tan gian man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu quang) OR (thieu quang)) - nhanh tinh cua nhung cong tan gian man.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu quang) or (thieu quang)) - nhanh tinh cua nhung cong tan gian man*.