Perhaps you should try some spelling variations:
nhung tuong » nhung huong, nhung phuong, hung vuong
hieu quang » thieu quang, hieu quan, hieu qua
hieu lang » chieu sang, nhieu tang, hieu van
trung vap » trung va, trung van, trung lap
trung cap » truong cao, trung tam
tuong dan » huong dan, tung dan, xuong dan
dan chan » dan gian, dan ca, van chat
chan cap » khan cap, than cap, cao cap

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 lang) OR (hieu quang)) - manh ((trung vap) or (trung cap)) nhung tuong dan chan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu lang) OR (hieu quang)) - manh ((trung vap) OR (trung cap)) nhung tuong dan chan cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu lang) OR (hieu quang)) - manh ((trung vap) or (trung cap)) nhung tuong dan chan cap".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu lang) OR (hieu quang)) - manh ((trung vap) or (trung cap)) nhung tuong dan chan cap*.