Perhaps you should try some spelling variations:
thpt thang » thpt hung, tat thang, thpt quang
thang khan » khang khuan, thang thanh, thanh phan
doi chieu » doc hieu, doi chi, mot chieu
phan dan » phan dang, phan dau, nhan dan
dan dung » van dung, tin dung, ap dung
dung ung » dung cong
ung thpt » ung thu
khan ap » khan cap, han ap, khan dam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) OR (toc thieu)) sach - phan dan dung ung thpt thang khan ap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (toc thieu)) sach - phan dan dung ung thpt thang khan ap".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (toc thieu)) sach - phan dan dung ung thpt thang khan ap*.