Perhaps you should try some spelling variations:
trinh vat » trinh van, trinh luat, sinh vat
ban trinh » ban tinh, dan trinh, van trinh
cau tren » cu tren, dau tren, cau treo
tu sach » thu sach, su sach, tu cach
cam cua » ca cua, nam cua, cau cua
ca tren » cu tren, la tren, co tren
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
te sach » toc sach
ve cam » ve cham, ve cac, va cam

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 lang xa hoi. hieu ve cam cua ban trinh vat ((cau tren) OR (ca tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky lang xa hoi. hieu ve cam cua ban trinh vat ((cau tren) OR (ca tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ky lang xa hoi. hieu ve cam cua ban trinh vat ((cau tren) OR (ca tren))".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky lang xa hoi. hieu ve cam cua ban trinh vat ((cau tren) OR (ca tren))*.