Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, va cam
luc va » duc va, tuc va, loc va
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cac) or (thu sach)) ky nang ma hoi. hieu ((ve cam) or (va cac)) luc va hanh di cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cac) OR (thu sach)) ky nang ma hoi. hieu ((ve cam) OR (va cac)) luc va hanh di cua vat.
• Adding a wildcard symbol may retrieve word variants: ((tu cac) or (thu sach)) ky nang ma hoi. hieu ((ve cam) or (va cac)) luc va hanh di cua vat*.