Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
cau tren » cu tren, dau tren, ca tren
hoc hoa » hoc khoa
sach ky » sac ky, sach y, sach ty
van han » van phan, van nhan, van hoan
hoc hoi » hoc khoi, hoc noi, hoc moi
tai cau » tai cac, tai cao
hieu ve » hieu va, hieu van
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: thu sach ky nang ((hoc hoi) OR (hoc hoa)). hieu ve cam xuc ((van han) or (van hanh)) tai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ((hoc hoi) OR (hoc hoa)). hieu ve cam xuc ((van han) OR (van hanh)) tai cau tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang ((hoc hoi) OR (hoc hoa)). hieu ve cam xuc ((van han) or (van hanh)) tai cau tren*".