Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
hanh vai » hanh vi, hanh va, hanh tai
hieu ve » hieu va, hieu van
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
ve cham » va cham, ve chat, vu cham
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
hoc cac » hoc cao
vu sach » vu bach, su sach, vu khach
ma hoi » mai hoi, xa hoi, ma hoa
cua tu » cua tuc, cua su, cua cu

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 (vu sach))) or (hoc cac)) ky nang ma hoi. hieu ve cham thuc va hanh vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (vu sach))) OR (hoc cac)) ky nang ma hoi. hieu ve cham thuc va hanh vai cua tu.
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) or (vu sach))) or (hoc cac)) ky nang ma hoi. hieu ve cham thuc va hanh vai cua tu*.