Perhaps you should try some spelling variations:
chong lai » chong li, cong lai, thong lai
chong mai » chong ma, thuong mai, phuong mai
thuat lap » thuat lanh, thuat xay, thuat bai
tham cong » pham cong, thai cong, tham cung
cao nhan » ca nhan, tao nhan, cam nhan
lap tham » lap thanh, phap tham, lap tai
cong khi » cong thai, khong khi, co khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( hoc cao nhan ((chong lai) OR (chong mai)) đong luc ) or ( thuat lap tham cong khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( hoc cao nhan ((chong lai) OR (chong mai)) đong luc ) OR ( thuat lap tham cong khi đong luc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( hoc cao nhan ((chong lai) OR (chong mai)) đong luc ) or ( thuat lap tham cong khi đong luc ))".
• Adding a wildcard symbol may retrieve word variants: (( hoc cao nhan ((chong lai) OR (chong mai)) đong luc ) or ( thuat lap tham cong khi đong luc ))*.