Perhaps you should try some spelling variations:
tran manh » tran minh, tran thanh, tran van
hoc sach » hoc sinh, hoc anh
manh hai » lanh hai, minh hai, thanh hai
dan tran » dang tran, tan tran, dan than
cua viet » ca viet, hoa viet, cua vat
bo sach » co sach
ky dang » ky nang, ky danh
hieu ve » hieu va, hieu van
hoc cac » hoc cao
hai cua » thai cua, dai cua, hoi cua
dang xa » dang xay, lang xa, dang ha
ve cac » va cac, vien cac

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) or (hoc cac))) or (bo sach)) ky dang xa hoi. hieu ve cac dan tran manh hai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((hoc sach) OR (hoc cac))) OR (bo sach)) ky dang xa hoi. hieu ve cac dan tran manh hai cua viet.
• Adding a wildcard symbol may retrieve word variants: ((((hoc sach) or (hoc cac))) or (bo sach)) ky dang xa hoi. hieu ve cac dan tran manh hai cua viet*.