Perhaps you should try some spelling variations:
thanh van » thanh toan, thanh phan, thanh nhan
hoc sach » hoc sinh, hoc cac, hoc anh
tay lang » tai lang, tay tang, tay quang
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
y lang » o lang, _ lang, yen lang
va cam » va cham, va cac, va cao
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ((y lang) OR (tay lang)) xa hoi. hieu va cam duc va ((thanh van) or (thanh san)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ((y lang) OR (tay lang)) xa hoi. hieu va cam duc va ((thanh van) OR (thanh san)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ((y lang) OR (tay lang)) xa hoi. hieu va cam duc va ((thanh van) or (thanh san)) cua te".
• Adding a wildcard symbol may retrieve word variants: hoc sach ((y lang) OR (tay lang)) xa hoi. hieu va cam duc va ((thanh van) or (thanh san)) cua te*.