Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
van hanh » van thanh, ban hanh, van anh
cau tren » cu tren, dau tren, ca tren
nang hoc » nang doc, nang luc, dong hoc
hoc hoi » hoc khoi, hoc hoa, hoc noi
van han » van phan, van nhan, van hoan
tu sach » su sach, te sach, tu cach
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) OR (tu sach)) ky nang hoc hoi. 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) OR (tu sach)) ky nang hoc hoi. 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) OR (tu sach)) ky nang hoc hoi. hieu ve cam xuc ((van han) or (van hanh)) tai cau tren*".