Perhaps you should try some spelling variations:
gianh lan » gian lan, gianh lai, gian dan
cac trung » cac truong, dac trung, bac trung
cac truc » cau truc, cac tru, sach truc
va gianh » va gian, van giang, va giai
sinh ky » sinh ly, sinh y, kinh ky
hieu va » hieu qua
lan cua » lang cua, ban cua, lai cua
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sinh ky nang x hoi. ((hieu va) or (lieu va)) ((cac truc) OR (cac trung)) va gianh lan cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh ky nang x hoi. ((hieu va) OR (lieu va)) ((cac truc) OR (cac trung)) va gianh lan cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sinh ky nang x hoi. ((hieu va) or (lieu va)) ((cac truc) OR (cac trung)) va gianh lan cua te".
• Adding a wildcard symbol may retrieve word variants: hoc sinh ky nang x hoi. ((hieu va) or (lieu va)) ((cac truc) OR (cac trung)) va gianh lan cua te*.