Perhaps you should try some spelling variations:
trinh vi » trinh va, trinh ve, trinh viet
dang tay » dang xay, dung tay, dan tay
tu sach » thu sach, su sach, tu cach
tinh vi » tinh voi, tinh va, dinh vi
hieu ve » hieu va, hieu van
tay hoi » tay ho, tao hoi, tay thai
ky dang » ky nang, ky danh
te sach » toc sach
cu tren » tu tren, dua tren
ve nam » he nam, va nam, le nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) ky dang tay hoi. hieu ve nam cua ban ((tinh vi) or (trinh vi)) cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky dang tay hoi. hieu ve nam cua ban ((tinh vi) OR (trinh vi)) cu tren.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky dang tay hoi. hieu ve nam cua ban ((tinh vi) or (trinh vi)) cu tren*.