Perhaps you should try some spelling variations:
loai hoc » logic hoc, loai khoa, hoa hoc
danh vai » danh sai, danh va, doanh van
vai cua » dai cua, hai cua, lai cua
hieu su » hieu sau, tieu su, hieu so
ky tang » ky nang, ky dang, kho tang
va danh » va dinh, va dan, va hanh
hieu va » lieu va, hieu qua
tu van » tu va
cua te » cua tu
xu va » xu van, tu va, su va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu van ky tang ((loai hoc) OR (dai hoc)). ((hieu su) or (hieu va)) chao xu va danh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu van ky tang ((loai hoc) OR (dai hoc)). ((hieu su) OR (hieu va)) chao xu va danh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu van ky tang ((loai hoc) OR (dai hoc)). ((hieu su) or (hieu va)) chao xu va danh vai cua te".
• Adding a wildcard symbol may retrieve word variants: tu van ky tang ((loai hoc) OR (dai hoc)). ((hieu su) or (hieu va)) chao xu va danh vai cua te*.