Perhaps you should try some spelling variations:
tieng chuong » tien chuong, vien chuong, thien chuong
quyen tap » tuyen tap, luyen tap, quyen cap
cac chien » cuoc chien, van chien, nam chien
hoc tieng » hoc hien
cac khu » cac thu, cac khoi, cac kieu
vat y » vat ly, vat _
va y » va ky, va my, va ly

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

• Performing a fuzzy search may retrieve terms with similar spellings: quyen tap ((cac chien) or (cac khu)) đe co ban ((va y) OR (vat y)) hoc tieng chuong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: quyen tap ((cac chien) OR (cac khu)) đe co ban ((va y) OR (vat y)) hoc tieng chuong.
• The words AND, OR and NOT may confuse the search; try adding quotes: "quyen tap ((cac chien) or (cac khu)) đe co ban ((va y) OR (vat y)) hoc tieng chuong".
• Adding a wildcard symbol may retrieve word variants: quyen tap ((cac chien) or (cac khu)) đe co ban ((va y) OR (vat y)) hoc tieng chuong*.