Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
nang mai » nang ma, nang tai, lang mai
tu sach » thu sach, su sach, te sach
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
va danh » va dinh, va dan, va hanh
vai cua » hai cua, lai cua, bai cua
ve cac » va cac, vien cac

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 (thuat lanh)) ky nang mai hoi. hieu ve cac duc va danh ((vai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat lanh)) ky nang mai hoi. hieu ve cac duc va danh ((vai cua) OR (dai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat lanh)) ky nang mai hoi. hieu ve cac duc va danh ((vai cua) or (dai cua)) tre*.