Perhaps you should try some spelling variations:
phuong thong » phuong trong, thong thong, phuong hoang
thieu khang » chieu khong, thieu quang
nhanh thong » nhanh chong, nhanh thang, nhan thong
thieu sang » chieu sang, thieu quang, hieu lang
va phuong » va thuong, cac phuong
manh toan » thanh toan, tinh toan
thong va » thong cua, truong va, thong qua

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 sang) OR (thieu khang)) - nhanh thong va phuong thong ((manh toan) or (anh tuan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thieu khang)) - nhanh thong va phuong thong ((manh toan) OR (anh tuan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) OR (thieu khang)) - nhanh thong va phuong thong ((manh toan) or (anh tuan)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) OR (thieu khang)) - nhanh thong va phuong thong ((manh toan) or (anh tuan)) cao*.