Perhaps you should try some spelling variations:
tinh dai » trinh dai, tinh da, tinh hai
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
hang o2 » hang hoa, hang rok, hang ton
thi van » thi lan, thi hanh, thi nang
hac duc » hoc duc, ha duc, thach duc
va tinh » may tinh
hang o » hang do, hoang o, thang o
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: te sach tu ((hang o) OR (hang o2)) hoi. ((thien van) or (thi van)) hac duc va tinh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu ((hang o) OR (hang o2)) hoi. ((thien van) OR (thi van)) hac duc va tinh dai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu ((hang o) OR (hang o2)) hoi. ((thien van) or (thi van)) hac duc va tinh dai cua te".
• Adding a wildcard symbol may retrieve word variants: te sach tu ((hang o) OR (hang o2)) hoi. ((thien van) or (thi van)) hac duc va tinh dai cua te*.